Alexandrite

Usual Treatments - None
Hardness - 8.5
Color Change
Major Sources - Brazil, Tanzania, Russia

Chalcedony

Usual Treatments - None
Hardness - 6.5 to 7
Major Sources - Blue: Africa
Lavender: United States

Sapphire, Blue

Usual Treatments - Heat
Hardness - 9
Major Sources - Australia, Thailand, Sri Lanka, India,
United States, Kenya, Tanzania, Myanmar, Kampuchea

Blue Topaz

Usual Treatments - Radiation
Hardness - 8
Major Sources - Brazil, Nigeria, Australia,
Myanmar, Mexico, Namibia, Pakistan, Sri Lanka

Fire Opal

Usual Treatments - None
Hardness - 5 to 6.5
Major Source - Mexico

Pearl, Tahitian Cultured

Usual Treatments - Color Stabilization
Hardness - 2.5 to 4
Major Source - Tahiti

Peridot

Usual Treatments - None
Hardness - 6.5 to 7
Major Sources - United States, China, Australia,
Brazil, Myanmar, Kenya, Mexico, Sri Lanka

Zircon, Blue

Usual Treatments - Heat
Hardness - 7.5
Major Sources - Kampuchea, Sri Lanka, Myanmar,
Australia, Thailand, China

Emerald

Usual Treatments - Oiling, Resin Infusion
Hardness - 7.5 to 8

Major Sources - Afghanistan, Columbia, Zambia, Brazil, Zimbabwe

Amethyst

Usual Treatments - Heat
Hardness - 7
Major sources - Africa, South America, Russia,
Mexico, Zambia

Iolite

Usual Treatments - None
Hardness - 7 to 7.5
Major Sources - India, Tanzania, Brazil, Sri Lanka,
Madagascar, Namibia, Myanmar

Tourmaline, Pink

Usual Treatments - Heat, Radiation
Hardness - 7 to 7.5
Major Sources - Brazil, India, Afghanistan, Myanmar, Kenya, Tanzania, United States, Mozambique

Topaz - Color Fusion:

Mystic, Buick, Poppy, Ice Blue
Usual Treatments - Diffusion

Hardness - 8
Major Sources - Brazil, Nigeria, Australia, Myanmar, Mexico, Namibia, Pakistan, Sri Lanka

Opal, White & Black

Usual Treatments - None
Hardness - 5 to 6.5
Major Source - Australia

Pearl, Akoya Cultured

Usual Treatments - Color Stabilization
Hardness - 2.5 to 4
Major Source - Japan

Smoky Quartz

Usual Treatments - Heat, Impregnation
Hardness - 7
Major Sources - Brazil, Madagascar, Uruguay, Sri
Lanka, South Africa

Diamond, White

Usual Treatments - None
Hardness - 10
Major Sources - Canada, Russia

Jade, Jadeite

Usual Treatments - Dyed (ours is untreated)
Hardness - 7
Major Sources - Burma, China

Ametrine

Usual Treatments - None

Hardness - 7
Major Source - Bolivia

Onyx

Usual Treatments - Dyeing
Hardness - 6.5 to 7
Major Sources - Brazil, Madagascar, Uruguay,
United States

Tanzanite

Usual Treatments - Heat

Hardness - 6 to 7
Major Source - Tanzania

Garnet

Usual Treatments - None
Hardness - 7 to 7.5
Major Sources - Africa, Sri Lanka, India, East
Africa, Australia, Brazil, United States

Pearl, Tahitian Cultured

Usual Treatments - Color Stabilization
Hardness - 2.5 to 4
Major Source - Tahiti

Pearl, Mahe

Usual Treatments - Color Stabilization
Hardness - 2.5 to 4
Major Sources - China, Japan

Tourmaline, Green

Usual Treatments - Heat
Hardness - 7 to 7.5
Major Sources - United States, Brazil, Afghanistan, India, Kenya, Madagascar, Myanmar, Pakistan, Mozambique

Diamond, Colored

Both natural and treated colors are available
Hardness - 10
Major Sources - Canada, Russia, Australia

Topaz, Diffused

Usual Treatments - Diffusion
Hardness - 8
Major Sources - Brazil, Nigeria, Australia,
Myanmar, Mexico, Namibia, Pakistan, Sri Lanka

Aquamarine

Usual Treatments - Heat
Hardness - 7.5 to 8
Major Sources - South America, Africa, China

Ruby

Usual. Treatments - Heat
Hardness - 9
Major Sources - Thailand, Myanmar, Kampuchea, Sri Lanka, Kenya, India, Afghanistan, Pakistan, Tanzania, Madagascar

Precious Topaz

Usual Treatments - None
Hardness - 8
Major Source - Brazil

Garnet, Tsavorite

Usual Treatments - None
Hardness - 7 to 7.5
Major Sources - Sri Lanka, Kenya, Tanzania, Brazil,
India

Jade, Nephrite

Usual Treatments - None
Hardness - 6.5
Major Sources - Taiwan, Canada, Australia, China,
New Zealand

Pearl, Freshwater

Usual Treatments - Color Stabilization
Hardness - 2.5 to 4
Major Sources - China, Japan

Sapphire, Yellow

Usual Treatments - Heat Diffusion

Hardness - 9
Major Sources - Australia, Thailand, Sri Lanka,
United States, India, Tanzania, Kamduchea, Myanmar, Madagascar

Citrine

Usual Treatments - Heat
Hardness 7
Major Sources - Brazil, Bolivia