Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Category
Mineral (Synthetic Paper And Ink Polymorph)
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
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Quartz crystal
Quartz (Silicon dioxide, SiO2)
mineral
Galena
Lead Sulfide (PbS)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gossan (Limonite/Ironstone)
Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Geode Nodules / Keokuk Geode
Quartz / Chalcedony Geode (SiO2)
sedimentary
Geode
Quartz nodule / Chalcedony-lined cavity
sedimentary
Septarian (Dragon Stone)
Septarian Nodule (Aragonite, Calcite, Limestone)
sedimentary
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Malachite
Copper Carbonate Hydroxide, Cu2CO3(OH)2
mineral
Travertine
Calcium Carbonate (CaCO3)
sedimentary
Prehnite
Ca2Al(AlSi3O10)(OH)2
mineral
Quartz with Inclusions
Silicon Dioxide (SiO2)
mineral
Limonite with Quartz
Hydrated Iron Oxide Hydroxide, FeO(OH)·nH₂O with SiO₂
mineral
Hemimorphite
Hemimorphite (Zn4Si2O7(OH)2·H2O)
mineral
Satin Spar Gypsum (Selenite Wand)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Fuchsite
Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Mineral
Rough Apatite in Matrix
Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Bloodstone
Chalcedony (cryptocrystalline quartz)
Mineral/Semiprecious Stone
Limonite and Goethite on Gossan
FeO(OH)·nH2O
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Chrysocolla
Chrysocolla; (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Goethite
Goethite (FeO(OH))
mineral
Rhodonite
Manganese silicate (MnSiO3)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Satin Spar (often sold as Selenite)
Gypsum (CaSO4·2H2O)
mineral
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral