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Gemstones
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Treatments/Benefits
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Care Instructions
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Agate gemstone
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Heated, dyed to enhance bands in layers
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Normal care
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Alexandrite gemstone
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None
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Normal care
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Almandite gemstone (Garnet)
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None
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Normal care but avoid sudden temperature changes
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Amber gemstone
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Occasionally heat- treated or dyed to deepen color
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Avoid chemicals, steam and ultrasonic cleaning
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Amethyst gemstone (Quartz)
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Occasionally heat- treated to improve color
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Normal care
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Ametrine gemstone (Quartz)
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None
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Normal care
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Andalusite gemstone
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Rarely heat-treated to improve color
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Normal care
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Apatite gemstone
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None
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Avoid chemicals, steam and ultrasonic cleaning
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Aquamarine gemstone (Beryl)
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Usually heat-treated to improve color
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Normal care
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Aventurine gemstone (Quartz)
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None
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Normal care
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Azurite gemstone
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Rarely filled with epoxy or resin for smoother surface
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Avoid chemicals, steam and ultrasonic cleaning
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Azurmalachite gemstone
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Rarely filled with epoxy or resin for smoother surface
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Avoid chemicals, steam and ultrasonic cleaning
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Blue Topaz gemstone
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Usually irradiated and heated to produce blue color
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Normal care but avoid sudden temperature changes, ultrasonic cleaning and steamer
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Canary Aqua™ gemstone
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Commonly heated for color enhancement
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Normal care but avoid excessive heat.
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Cat's Eye gemstone
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None
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Normal care
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Chalcedony gemstone
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Usually dyed or heat-treated to produce different colors
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Normal care
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Chrome Diopside gemstone
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None
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Avoid chemicals and sudden temperature changes, avoid ultrasonic cleaning and steamer
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Citrine gemstone (Quartz)
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Usually heat-treated to improve color
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Normal care
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Coral gemstone
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Usually dyed or bleached to improve color
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Avoid chemicals, steam and ultrasonic cleaning
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Demantoid gemstone (Garnet)
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None
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Normal care but avoid sudden temperature changes
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Diamond gemstone - clear
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None
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Normal care
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Diamond gemstone - colored
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Usually heat-treated or irradiated for color
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Normal care
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Drusy Quartz gemstone
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coated and or dyed
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Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing
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Emerald gemstone (Beryl)
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Usually oiled to improve color
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Avoid chemicals, steam and ultrasonic cleaning
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Fluorite gemstone
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Usually heat treated or irradiated to improve color
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Avoid chemicals, steam and ultrasonic cleaning
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Garnet gemstone (also listed by type)
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None
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Normal care but avoid sudden temperature changes
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Gaspeite gemstone
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Occasionally stabilized with plastic
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Normal care
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Goshenite gemstone
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None
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Normal care but avoid sudden temperature changes
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Heliodor gemstone
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Irradiated for color enhancement
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Normal care
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Hematite gemstone
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None
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Normal care but avoid sudden temperature changes
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Hessonite gemstone (Garnet)
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None
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Normal care but avoid sudden temperature changes
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Howlite gemstone
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Occasionally dyed to improve color and to emulate turquoise
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Avoid steam and ultrasonic cleaning
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Indicolite gemstone (Tourmaline)
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Commonly heat-treated to improve color
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Normal care but avoid sudden temperature changes
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Iolite gemstone
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None
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Normal care but avoid sudden temperature changes
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Jade gemstone
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Commonly dyed, heated, occasionally filled with wax for appearance
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Normal care
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Jasper gemstone
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Occasionally dyed to enhance color
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Normal care
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Jet gemstone
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None
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Avoid steam and ultrasonic cleaning
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Kornerupine gemstone
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None
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Normal care but avoid rough handling and sudden temperature changes, ultrasonic cleaning and steamer
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Kunzite gemstone (Spodumene)
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Usually irradiated to enhance color
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Avoid sudden temperature changes, rough handling and exposure to strong light
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Kyanite gemstone
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None
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Avoid rough handling, steam and ultrasonic cleaning
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Labradorite gemstone
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None
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Avoid rough handling, steam and ultrasonic cleaning
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Lapis Lazuli gemstone
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Commonly dyed and paraffin-coated for color and shine
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Avoid chemicals, steam and ultrasonic cleaning
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Lepidolite gemstone
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None
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Normal care
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Malachite gemstone
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Wax or epoxy occasionally added to cover small chips and to smooth surface
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Avoid chemicals, steam and ultrasonic cleaning
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Mariposite gemstone
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None
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Normal care
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Moldavite gemstone
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None
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Normal care but avoid sudden temperature changes
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Moonstone gemstone
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None
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Normal care
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Morganite gemstone (Beryl)
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Commonly heat-treated to enhance color
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Normal care
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Mother of Pearl gemstone
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Commonly dyed to produce colors
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Avoid chemicals, steam and ultrasonic cleaning
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Muscovite gemstone
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None
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Normal care
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Mystic Topaz gemstone
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The top is coated to enhance the color
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Normal care but avoid abrasives and harsh chemicals. These stones should not be recut.
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Onyx gemstone (Chalcedony)
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Commonly dyed
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Normal care
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Opal gemstone
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To enhance appearance and durability, wax, oil or plastic may be added
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Avoid chemicals, steam and ultrasonic cleaning
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Pearl gemstone
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Commonly bleached, dyed or irradiated for consistent color
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Avoid chemicals (including hairspray and cosmetics), steam and ultrasonic cleaning
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Peridot gemstone
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None
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Avoid chemicals, steam and ultrasonic cleaning, sudden temperature changes
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Petalite gemstone
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None
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Avoid rough handling, ultrasonic cleaning
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Petrified Wood gemstone (see Chalcedony)
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None
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Normal care
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Pietersite gemstone
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None
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Normal care
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Pyrope gemstone (Garnet)
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None
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Normal care but avoid sudden temperature changes
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Rainbow Calsilica gemstone
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Occasionally stabilized with plastic
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Avoid chemicals, steam and ultrasonic cleaning
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Rhodochrosite gemstone
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None
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Avoid chemicals, rough handling, and excessive heat.
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Rhodolite gemstone (Garnet)
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None
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Normal care but avoid sudden temperature changes
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Rhodonite gemstone
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None
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Normal care
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Rosenite™ gemstone (Garnet)
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None
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Normal care but avoid sudden temperature changes
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Rubellite gemstone (Tourmaline)
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Commonly heat-treated or irriadiated to enhance color
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Normal care but avoid sudden temperature changes
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Ruby gemstone
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Occasionally glass-filled to enhance clarity
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Avoid cleaning solutions, ultrasonic cleaning, heat and repairs; they can cause damage, as this treatment is not considered permanent or stable
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Rutilated Quartz gemstone
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None
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Normal care but avoid heat, temperature changes, steaming, chemicals and ultrasonic cleaning
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Sapphire gemstone
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Usually heat-treated to enhance color
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Normal care
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Scapolite gemstone
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Commonly irradiated for color enhancement
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Avoid steam and ultrasonic cleaning, avoid exposure to strong light
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Serpentine gemstone
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Commonly dyed or waxed to improve appearance or alter colors
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Avoid steam and ultrasonic cleaning
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Shell gemstone
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Commonly dyed to produce colors
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Avoid chemicals, steam and ultrasonic cleaning
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Smokey Quartz gemstone
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Occasionally heat-treated or irradiated to improve color
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Normal care but avoid heat, temperature changes, steaming, chemicals and ultrasonic cleaning
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Sodalite gemstone
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None
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Avoid chemicals, steam and ultrasonic cleaning
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Spessartite gemstone (Garnet)
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None
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Normal care but avoid sudden temperature changes
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Sphene gemstone
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None
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Avoid chemicals, sudden temperature changes, and rough handling
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Spinel gemstone
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None
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Normal care
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Sugilite gemstone
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None
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Avoid steam and ultrasonic cleaning
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Sunstone gemstone
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None
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Avoid chemicals, steam and ultrasonic cleaning
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Tanzanite gemstone
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Zoisite is routinely heat-treated to produce Tanzanite’s signature violet-blue color
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Avoid steam, ultrasonic cleaning and sudden temperature changes
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Tiger Iron gemstone
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None
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Normal care
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Tiger's Eye gemstone (Quartz)
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Commonly heat-treated, dyed or bleached to enhance color
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Avoid sudden temperatures changes and strong chemicals
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Topaz gemstone (other than blue)
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Usually heat-treated to create colors
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Normal care but avoid sudden temperature changes, ultrasonic cleaning and steamer
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Tourmaline gemstone
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Green and blue commonly heat-treated to enhance color. Yellow and red irradiated
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Normal care but avoid sudden temperature changes, ultrasonic cleaning and steamer
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Tsvorite gemstone (Garnet)
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None
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Normal care but avoid sudden temperature changes
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Turquoise gemstone
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Commonly stabilized – infused with plastic to enhance durability and color
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Avoid chemicals, steam and ultrasonic cleaning. Perspiration and cosmetics may alter color.
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Unakite gemstone
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None
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Avoid chemicals, steam and ultrasonic cleaning
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Variscite gemstone
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None
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Avoid chemicals, steam and ultrasonic cleaning
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Verdelite gemstone (Tourmaline)
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Commonly heat-treated to enhance color
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Normal care but avoid sudden temperature changes, ultrasonic cleaning and steamer
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White Aqua™ gemstone (Beryl)
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None
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Normal care
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Yellow Beryl gemstone (Heliodor)
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Commonly heated for color enhancement
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Normal care but avoid sudden temperature changes, ultrasonic cleaning and steamer
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Zircon gemstone
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Routinely heat-treated to create blue color
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Avoid abrasives, rough wear and exposure to strong light.
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