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Gemstone Crystal System Density Hardness Refractive index Treatments
Chalcedony microcrystalline 2.65 7.0 1.535-1.539 dying


chalcedony

Color:
All Colors
Clarity: Semi-transparent to opaque
Optic Character: AGG
Cause of Color: Many causes; dependent on the variety
Fluorescence:Generally Inert
Fracture : Concoidal, sometimes granular
Luster : Vitreous when polishe; dull to waxy rough
Cleavage : None
Durability: Good
Characteristics for Identification:
Dependent on Variety

Locality:
Commonly found around the world

Chalcedony
SiO2 (Silicon Dioxide)

Chalcedony is microcrystalline quartz. The word is often used to encompass all varieties of microcrystalline quartz such as jasper, carnelian, chrysoprase and bloodstone. The mineral is very abundant and found all over the world.The most common variety is a muted blue-gray tone (unnamed) found in geodes and vugs. Curiously, this variety has no folk lore associated with it. New age practitioners see this translucent gray stone as lacking in "vibes".

Quartz Family:

Amethyst
Citrine
Ametrine
Rutilated Quartz
Smokey Quartz
Rose Quartz
Dendritic Quartz
Tourmalinated Quartz
Phantom Quartz

Microcrystalline
Quartz:

Agate
Chrysoprase
Jasper
Carnelian
Bloodstone
Onyx