Obsidian
Volcanic Glass (SiO2)
igneous
Category
Carved Stone
Browse carved stone specimens identified by the Rock Identifier community.
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Sodalite
Sodalite (Na4Al3Si3O12Cl)
Mineral
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
igneous
Turquoise (Blue Howlite / Magnesite imitation)
CuAl6(PO4)4(OH)8·4H2O (for natural Turquoise); Ca2B5SiO9(OH)5 (for Howlite)
mineral
Tiger Jasper (Polychrome Jasper)
Silicon Dioxide (SiO2) with iron oxide and other mineral inclusions
sedimentary
Jade (likely nephrite)
Nephrite jade: interlocking actinolite–tremolite amphibole, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂; exact identification requires testing
metamorphic
Anthracite Coal
Anthracite coal (High-rank coal)
sedimentary
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Mineral
Porphyry
Porphyritic Rhyolite or Andesite
igneous
Banded Calcite (translucent variety)
Calcite (Calcium Carbonate, CaCO3)
mineral
Chalcedony
Chalcedony (SiO2)
mineral
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite)
mineral
Green Jasper / Green Quartz
Silicon dioxide (SiO2) with mineral impurities
sedimentary
Rose Quartz
Silicon Dioxide (Quartz), SiO2
mineral
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
mineral
Chalcedony (Yellow Chert / Agate)
Quartz (Silicon Dioxide - SiO2)
mineral
Black Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Carnelian
Carnelian (microcrystalline quartz, SiO2)
gemstone
Satin Spar (often marketed as Selenite)
Gypsum (CaSO4·2H2O)
mineral
Snowflake Obsidian
Spherulitic Obsidian (Volcanic glass containing Cristobalite)
igneous
Carnelian
Carnelian (Cryptocrystalline Quartz, SiO2)
mineral
Green Jasper / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Carnelian (Red Agate)
Silicon Dioxide (SiO2)
mineral
Red Jasper (Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
White Quartz (Milky Quartz)
Quartz (Silicon Dioxide - SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, manganese, or iron
mineral
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2 (Calcium magnesium iron silicate)
metamorphic
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Rose Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Obsidian
Obsidian (Volcanic Glass)
igneous
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2 (Actinolite-Tremolite series)
metamorphic
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Himalayan Pink Salt
Halite (NaCl) with trace minerals (Iron, Magnesium, Potassium)
mineral
Obsidian
Obsidian (Volcanic Glass, SiO2)
igneous
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Kambaba Jasper
Rhyolite (with Stromatolite fossil inclusions)
sedimentary
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic