Emerald
Beryl (Be3Al2(SiO3)6)
gemstone
Category
Mineraloid (Man Made Origin)
Browse mineraloid (man made origin) specimens identified by the Rock Identifier community.
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Chert (Flint) Artifact
Silicon Dioxide (SiO2)
sedimentary
Chondrite Meteorite
Ordinary Chondrite (S-type asteroid origin)
igneous
Chondrite Meteorite
Ordinary Chondrite (L or H class)
meteorite
Amber
Fossilized Tree Resin
gemstone
Black Obsidian
Volcanic Glass (Amorphous SiO2 with trace impurities)
igneous
Kambaba Jasper
Rhyolite (Volcanic rock) or Stromatolite (debated)
Igneous/Sedimentary (debated)
Limonite (Iron Ore)
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)
Mineral
Fluorite (translucent octahedral crystal)
Calcium fluoride (CaF2)
mineral
Black Obsidian
Volcanic glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass (Amorphous silicon dioxide with impurities)
igneous
Obsidian
Volcanic Glass (SiO2 + impurities)
igneous
Fulgurite
Fulgurite (Lechatelierite)
metamorphic
Black Obsidian
Volcanic Glass (SiO2 + impurities)
Igneous
Spider Conch Shell
Lambis lambis (Calcium Carbonate, CaCO3)
sedimentary
Chondrite Meteorite
Ordinary Chondrite (L, LL, or H type)
meteorite
Chondrite Meteorite
Stony Meteorite (Chondrite)
igneous
Chondrite Meteorite
Ordinary Chondrite (OC)
Mineral (Extraterrestrial)
Nephrite Jade (Yellow Skin)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Man-made Object (Metal/Alloy)
Purple Slate
Foliated slate (Pelitic origin)
metamorphic
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
igneous
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Gold Sheen Obsidian
Volcanic Glass (SiO2 + Fe3O4 / Gas Inclusions)
igneous
Anthracite Coal
Anthracite (Carbon-rich mineraloid)
metamorphic
Amber
Succinite (Organic Mineraloid) - C10H16O
mineral
Chondrite Meteorite (Possibility)
Stony Meteorite (Chondrite)
igneous
Terrazzo (with Marble and Granite fragments)
Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates
sedimentary (man-made composite)
Amber
Fossilized Tree Resin
gemstone
Coral Skeleton (Scleractinia)
Aragonite (CaCO3) biomineralisation within Anthozoa
fossil
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride) - CaF2
mineral
Epidote with Quartz
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Obsidian
Volcanic glass
igneous
Limonite (Ironstone)
Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))
mineral