Toughness: Good
Chalcedony is a cryptocrystalline silica aggregate, it is made up of microscopic crystals of quartz and morganite. Chalcedonies vary greatly in color due to its chemical composition. In its simplest form, chalcedony is white to milky grey. The presence of metallic salts give this stone a variety of color. The Chalcedony family includes bloodstone, chrysoprase, jasper, and onyx.
- Chalcedony is named for an ancient Turkish seaport Chalcedon.
- Greek sailors wore chalcedony to avoid drowning.
- 17th century Europeans believed chalcedony would ward of ghosts.
- Native American Indians believed chalcedony was a sacred stone.
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