CHALCEDONY281

CHALCEDONY:

PHYSICAL CHARACTERISTICS:

Agate is a banded variety (sometimes with translucent bands)

Bloodstone is green with red speckles

Carnelian is yellow to orange

Chrysoprase is green

Flint is generally black with a fibrous microscopic structure

Jasper is any colorful agate

Onyx is black, white, or alternating black and white

Sard is yellow to brown Sardonyx is banded, alternating sard and (usually white) onyx

Chalcedony is the generic name for "cryptocrystalline quartz", meaning the individual crystals are too small to see. The term is frequently used when the specific variety is uncertain (for example, a sample that would be called an agate if it showed banding), or in technical references.

"The Mineral Chalcedony"

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