Gemstone Treatments and Care

Gemstones Treatments Caring for your Gemstones
Abalone gemstone None Avoid chemicals, stem/heat, ultrasonic, sudden temperature changes
Agate gemstone (see Chalcedony) Heated, dyed to enhance bands in layers Normal care
Alexandrite gemstone None Normal care
Almandite gemstone (Garnet) None Normal care but avoid sudden temperature changes
Amazonite gemstone

http://www.minerals.net/gemstone/amazonite_gemstone.aspx

Heated, Irradiated, Impregnated with a colorless wax or oil, plastic and hardened agents to improve appearance Avoid chemicals, steam and ultrasonic cleaning
Amber gemstone Occasionally heat- treated, dyed or surface treated to deepen color Avoid chemicals, steam and ultrasonic cleaning
Amethyst gemstone (Quartz) Occasionally heat- treated to improve color Normal care
Ametrine gemstone (Quartz) None Normal care
Ammolite gemstone Impregnated Avoid heat, household chemicals and ultrasonic
Andalusite gemstone

www.minerals.net/gemstone/andalusite_gemstone.aspx

Rarely heat-treated to improve color Normal care
Apatite gemstone None Avoid chemicals, steam and ultrasonic cleaning
Aquamarine gemstone (Beryl) Usually heat-treated to improve color Normal care
Aventurine gemstone (Quartz) None Normal care
Azurite gemstone Rarely filled with epoxy or resin for smoother surface Avoid chemicals, steam and ultrasonic cleaning
Azurmalachite gemstone Rarely filled with epoxy or resin for smoother surface Avoid chemicals, steam and ultrasonic cleaning
Beryl  gemstone Occasionally heat treated, irradiated Avoid chemicals, stem/heat, ultrasonic, sudden temperature changes
Bloodstone (Chalcedony) None Avoid chemicals, steam and ultrasonic cleaning
Blue Topaz gemstone Usually irradiated and heated to produce blue color Normal care but avoid sudden temperature changes, ultrasonic cleaning and steamer
Calcite gemstone Dyed, Impregnated with colorless plastic to improve appearance Avoid chemicals, stem/heat, ultrasonic, sudden temperature changes
Carnelian (Chalcedony) gemstone Dyed, heated Normal care, certain stones may fade in heat or light.
Cat’s Eye gemstone None Normal care
Chalcedony (Quartz) gemstone Usually dyed or heat-treated to produce different colors Normal care
Chrome Diopside gemstone None Avoid chemicals and sudden temperature changes, avoid ultrasonic cleaning and steamer
Chrysoprase (Chalcedony) gemstone None Avoid chemicals, steam and ultrasonic cleaning
Citrine gemstone (Quartz) Usually heat-treated or irradiated to improve color Normal care
Coral gemstone Usually dyed or bleached to improve color Avoid chemicals, steam and ultrasonic cleaning
Demantoid gemstone (Garnet) None Normal care but avoid sudden temperature changes
Diamond gemstone – clear None Normal care
Diamond gemstone – colored Usually heat-treated or irradiated for color Normal care
Drusy Quartz gemstone coated and or dyed Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & re polishing

https://gemfame.com/product-category/strawberry-quartz/

Emerald gemstone (Beryl) Usually oiled to improve color Avoid chemicals, steam and ultrasonic cleaning
Fluorite gemstone Usually heat treated or irradiated to improve color Avoid chemicals, steam and ultrasonic cleaning
Garnet gemstone None Normal care but avoid sudden temperature changes
Grossularite gemstone (Garnet) None Normal care but avoid sudden temperature changes
Heliodor gemstone Irradiated for color enhancement Normal care
Hematite gemstone None Normal care but avoid sudden temperature changes
Hessonite gemstone (Garnet) None Normal care but avoid sudden temperature changes
Hiddenite gemstone (Spodumene) Irradiated Normal care, Certain stones may fade in heat or light.
Howlite gemstone Occasionally dyed to improve color and to emulate turquoise & other stones Avoid steam and ultrasonic cleaning
Indicolite gemstone (Tourmaline) Commonly heat-treated to improve color Normal care but avoid sudden temperature changes
Iolite gemstone None Normal care but avoid sudden temperature changes
Ivory & Bone Bleached, dyed, Impregnated Avoid chemicals and ultrasonic, may discolor in time
Jade gemstone Commonly dyed, heated, occasionally filled with wax for appearance Normal care

gemfame.com/much-jade-worth/

Jasper (Chalcedony) gemstone Occasionally dyed to enhance color Normal care
Jet gemstone None Avoid steam and ultrasonic cleaning
Kunzite gemstone (Spodumene) Usually irradiated to enhance color Avoid sudden temperature changes, rough handling and exposure to strong light
Labradorite gemstone None Avoid rough handling, steam and ultrasonic cleaning
Lapis Lazuli gemstone Commonly dyed and paraffin-coated for color and shine Avoid chemicals, steam and ultrasonic cleaning
Lepidolite gemstone None Normal care
Malachite gemstone wax or epoxy occasionally added to improve durabilty and appearance and to smooth surface Avoid chemicals, steam and ultrasonic cleaning
Marcasite gemstone None Avoid chemicals, stem/heat, ultrasonic, sudden temperature changes
Mariposite gemstone None Normal care
Moldavite gemstone None Normal care but avoid sudden temperature changes
Moonstone gemstone None Normal care
Morganite gemstone (Beryl) Commonly heat-treated to enhance color Normal care
Mother of Pearl gemstone Commonly bleached, dyed, irradiated, coated to produce colors Avoid chemicals, steam and ultrasonic cleaning
Muscovite gemstone None Normal care
Mystic Topaz gemstone The top is coated to enhance the color Normal care but avoid abrasives and harsh chemicals. These stones should not be recut.
Obsidian gemstone None Avoid chemicals, steam and ultrasonic cleaning
Onyx gemstone (Chalcedony) Commonly dyed Normal care
Opal gemstone To enhance appearance and durability, wax, oil or plastic may be added Avoid chemicals, steam and ultrasonic cleaning
Pearl gemstone Commonly bleached, dyed, irradiated and coated to improve appearance Avoid chemicals (including hairspray and cosmetics), steam and ultrasonic cleaning
Peridot gemstone oil, wax and resins into voids, colorless hardened substance to improve appearance Avoid chemicals, steam and ultrasonic cleaning, sudden temperature changes
Petalite gemstone None Avoid rough handling, ultrasonic cleaning
Petrified Wood gemstone (see Chalcedony) None Normal care
Pietersite gemstone None Normal care
Prasiolite gemstone (praziolite) (Quartz) Usually heated Avoid chemicals, steam and ultrasonic cleaning
Prehnite gemstone Occasionally impregnated Avoid chemicals, steam and ultrasonic cleaning
Pyrope gemstone (Garnet) None Normal care but avoid sudden temperature changes
Quartz gemstone (also listed by type) Usually dyed or heat-treated to produce different colors Avoid chemicals, steam and ultrasonic cleaning

 

Quartzite gemstone Impregnated with colorless plastic Normal care
Rainbow Calsilica gemstone stabilized compressed – calsilica that is compressed together with a binding agent under extreme pressure and heat Avoid chemicals, steam and ultrasonic cleaning
Rhodochrosite gemstone None Avoid chemicals, rough handling, and excessive heat.
Rhodolite gemstone (Garnet) None Normal care but avoid sudden temperature changes
Rhodonite gemstone None Normal care
Rock Crystal (Quartz ) Usually heated Normal care
Rubellite gemstone (Tourmaline) Commonly heat-treated or irradiated to enhance color Normal care but avoid sudden temperature changes
Ruby gemstone Occasionally glass-filled to enhance clarity Avoid cleaning solutions, ultrasonic cleaning, heat and repairs; they can cause damage, as this treatment is not considered permanent or stable
Rutilated Quartz gemstone None (included with “needle like” rutile) Normal care but avoid heat, temperature changes, steaming, chemicals and ultrasonic cleaning
Sardonyx gemstone (Chalcedony) Usually dyed Avoid chemicals, stem/heat, ultrasonic, sudden temperature changes
Sapphire gemstone Usually heat-treated to enhance color, occasionally glass-filled to enhance clarity Avoid cleaning solutions, ultrasonic cleaning, heat and repairs; they can cause damage, as this treatment is not considered permanent or stable
Sard gemstone Dyed, heated Normal care, Certain stones may fade in heat or light.
Shell gemstone Commonly dyed to produce colors Avoid chemicals, steam and ultrasonic cleaning

http://www.jtv.com/library/shell-facts.html

Smokey Quartz gemstone Occasionally heat-treated or irradiated to improve color Normal care but avoid heat, temperature changes, steaming, chemicals and ultrasonic cleaning
Sodalite gemstone None Avoid chemicals, steam and ultrasonic cleaning
Spessartite gemstone (Garnet) None Normal care but avoid sudden temperature changes
Spinel gemstone None Normal care
Sugilite gemstone None Avoid steam and ultrasonic cleaning
Sunstone gemstone None Avoid chemicals, steam and ultrasonic cleaning
Tanzanite gemstone Zoisite is routinely heat-treated to produce Tanzanite’s signature violet-blue color Avoid steam, ultrasonic cleaning and sudden temperature changes
Tiger Iron gemstone None Normal care
Tiger’s Eye gemstone (Quartz) Commonly heat-treated, dyed or bleached to enhance color Avoid sudden temperatures changes and strong chemicals
Topaz gemstone (other than blue) Usually heat-treated to create colors Normal care but avoid sudden temperature changes, ultrasonic cleaning and steamer
Tourmaline gemstone Green and blue commonly heat-treated to enhance color. Yellow and red irradiated Normal care but avoid sudden temperature changes, ultrasonic cleaning and steamer
Tourmalinated gemstone (Quartz) None (Included with needles of black tourmaline) Avoid chemicals, steam and ultrasonic cleaning
Tsavorite gemstone (Garnet) None Normal care but avoid sudden temperature changes
Turquoise gemstone Commonly stabilized – infused with plastic to enhance durability and color stabilized compressed – turquoise nuggets that are compressed together with a binding agent under extreme pressure and heat. Avoid chemicals, steam and ultrasonic cleaning. Perspiration and cosmetics may alter color.
Unakite gemstone None Avoid chemicals, steam and ultrasonic cleaning
Variscite gemstone None Avoid chemicals, steam and ultrasonic cleaning
Verdelite gemstone (Tourmaline) Commonly heat-treated to enhance color Normal care but avoid sudden temperature changes, ultrasonic cleaning and steamer
White AquaTM gemstone (Beryl) None Normal care
Yellow Beryl gemstone (Heliodor) Commonly heated for color enhancement Normal care but avoid sudden temperature changes, ultrasonic cleaning and steamer
Zircon gemstone Routinely heat-treated to create blue color Avoid abrasives, rough wear and exposure to strong light.

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