Crystals

Orange calcite

Calcium carbonate mineral CaCO3 Calcite group Trigonal crystal system Mohs 3 Perfect rhombohedral cleavage Very strong double refraction Variable orange-red luminescence Orange Calcite: Warm Light in a Classic Carbonate Orange...

Orange calcite

Calcium carbonate mineral CaCO3 Calcite group Trigonal crystal system Mohs 3 Perfect rhombohedral cleavage Very strong double refraction Variable orange-red luminescence Orange Calcite: Warm Light in a Classic Carbonate Orange...

Mahogany obsidian

Natural volcanic glass Amorphous silica-rich material Mohs approximately 5–5.5 Specific gravity approximately 2.3–2.45 Iron-red and brown flow pattern Smoky tea-brown edge translucency No cleavage; conchoidal fracture Brittle, with very sharp...

Mahogany obsidian

Natural volcanic glass Amorphous silica-rich material Mohs approximately 5–5.5 Specific gravity approximately 2.3–2.45 Iron-red and brown flow pattern Smoky tea-brown edge translucency No cleavage; conchoidal fracture Brittle, with very sharp...

Synthetic aventurine

Aventurine glass • manufactured decorative glass containing reflective crystalline inclusions Classic brown-gold form commonly called goldstone Metallic copper forms the traditional internal “stars” Deep-blue forms are often called blue goldstone...

Synthetic aventurine

Aventurine glass • manufactured decorative glass containing reflective crystalline inclusions Classic brown-gold form commonly called goldstone Metallic copper forms the traditional internal “stars” Deep-blue forms are often called blue goldstone...

Shiva lingam

River stone associated with the Narmada Known as Narmada lingam or bāṇaliṅga Naturally rounded, commonly further shaped and polished Cream, ochre, gray, rust, brown, and black patterns Iron-bearing minerals commonly...

Shiva lingam

River stone associated with the Narmada Known as Narmada lingam or bāṇaliṅga Naturally rounded, commonly further shaped and polished Cream, ochre, gray, rust, brown, and black patterns Iron-bearing minerals commonly...

Snowflake obsidian

Snowflake obsidian

Tiger eye

Tiger’s Eye • chatoyant quartz with aligned amphibole-derived inclusions Dominant phase: SiO2 Host: columnar polycrystalline quartz Included fibers: crocidolite or related sodic amphibole Mohs about 6.5–7 • SG about 2.64–2.71...

Tiger eye

Tiger’s Eye • chatoyant quartz with aligned amphibole-derived inclusions Dominant phase: SiO2 Host: columnar polycrystalline quartz Included fibers: crocidolite or related sodic amphibole Mohs about 6.5–7 • SG about 2.64–2.71...

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