Green cabochon gemstone pendant, likely turquoise or dyed green turquoise
Probably turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification requires testing
gemstone
Category
Man Made Glass Mineral Simulant
Browse man made glass mineral simulant specimens identified by the Rock Identifier community.
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Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Tumbled quartz-rich stone, possibly blue quartz or granite
Quartz (SiO₂), with probable feldspar and dark accessory minerals
mineral
Snowflake Obsidian (Tumbled)
Obsidian with Cristobalite inclusions
igneous
Fluorite (left), Sodalite (middle), Dumortierite/Tumbled Quartzite (right)
Calcium Fluoride (CaF2), Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2), Aluminum Borosilicate (Al7(BO3)(SiO4)3O3)
mineral
Amethyst Quartz fragment
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Red Quartz (Tumbled)
Silicon Dioxide with Iron Oxide inclusions (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Muscovite Mica (Golden/Yellow variety)
KAl2(AlSi3O10)(F,OH)2
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Weathered quartz-rich stone, possibly chalcedony or calcite
Likely microcrystalline quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing
mineral
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chert (variant Flint/Jasper)
Microcrystalline Opaline Silica (SiO2)
sedimentary
Milky Quartz with Iron Staining and Matrix
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))
Mineral
Mixed Tumbled Quartz and Chlorite Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Obsidian
Volcanic glass
igneous
Yellow Fluorite
Calcium Fluoride (CaF2)
mineral
Quartz (Milky or Smoky variant)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
SiO2 (Silicon Dioxide)
mineral
Quartz (Druzy / Goldstone Gemstone Cabochon)
Silicon Dioxide (SiO2)
gemstone
Muscovite Mica
Muscovite: KAl2(AlSi3O10)(OH)2
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Bicolor Quartz Tumble
Silicon Dioxide (SiO2)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Rhyolite
Silicon Dioxide (SiO2) in extrusive igneous rock
igneous
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Crystalline Silica (SiO2)
mineral
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Quartz (Smoky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Snowflake Obsidian and Green Aventurine
Volcanic Glass (SiO2 with Cristobalite inclusions) and Quartz (SiO2 with Fuchsite)
igneous and metamorphic
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Quartz (Pale Rose or Milky Variety)
Silicon Dioxide (SiO2)
mineral