mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

Hardness: 6.5-7 Mohs; Color: sky-blue to semi-opaque light blue; Luster: waxy to vitreous; Structure: Microcrystalline; Specific Gravity: 2.6

Identified June 8, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs; Color: sky-blue to semi-opaque light blue; Luster: waxy to vitreous; Structure: Microcrystalline; Specific Gravity: 2.6

Formed in volcanic and sedimentary environments through the deposition of silica-rich fluids in rock cavities at low temperatures.

Primarily used in jewelry for beads, cabochons, and ornamental carvings. Also valued for metaphysical collection.

Named after the ancient town of Chalcedon in Asia Minor. It is known for its subtle inner glow and was once widely used for seals and signet rings.

Identify by its waxy luster, lack of cleavage, and uniform sky-blue color. Found commonly in Turkey, Namibia, Brazil, and the USA.

Gneiss or Schist

Gneiss or Mica Schist with Garnet

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Tumbled granite

Granite, a coarse-grained felsic intrusive igneous rock

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Pegmatite with Tourmaline and Quartz

Igneous Pegmatite

Granite

Granite (Phaneritic intrusive igneous rock)