gemstone
Green Chalcedony Ring
Silicon Dioxide (SiO2)
Hardness of 6.5-7 on the Mohs scale, translucent green color, waxy to vitreous luster, microcrystalline quartz structure, conchoidal fracture, specific gravity of 2.58-2.62.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, translucent green color, waxy to vitreous luster, microcrystalline quartz structure, conchoidal fracture, specific gravity of 2.58-2.62.
Formation & geological history
Formed in low-temperature hydrothermal environments and by the deposition of silica-rich groundwater in cavities of volcanic and sedimentary rocks.
Uses & applications
Used primarily in jewelry such as rings, pendants, and beads, as well as for decorative carvings and ornamental items.
Geological facts
Chalcedony has been used for thousands of years in ancient civilizations for intaglios, seals, and fine jewelry. The green variety is often referred to commercially by various trade names.
Field identification & locations
Identified by its microcrystalline structure, conchoidal fracture, and characteristic waxy luster. Common sources include Brazil, India, Madagascar, and the USA.
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