• Hardness

  6.5 - 7.0.

• Occurrence

  Worldwide. Chalcedony, a micro-crystalline member of the quartz family consists of a number of stones, namely agate, dendritic agate, fire agate, heliotrope (bloodstone), plasma, chrysoprase, prase, fossilized (petrified) wood, jasper, cornelian (carnelian), moss agate, onyx, sardonyx, and sard.

• Appearance

  Opaque to translucent, colors can vary quite wildly depending on the chalcedony variety.

• Enhancements

  Refer to specific chalcedony pages.

  More information on gemstone enhancements.

• Agate

• Aqua Blue Chalcedony

• Bloodstone

• Blue Mist Chalcedony

• Carnelian

• Carribbean Blue Chalcedony

• Chrysoprase

• Holly Blue

• Jasper

• Onyx

• Orange Chalcedony

• Sardonyx

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Last updated December 7, 2007
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