Tumbled Mixed Gemstones and Rocks
Various mineral species including quartz (SiO2) and silicate minerals
mineral
Category
Mineral (Synthetic)
Browse mineral (synthetic) specimens identified by the Rock Identifier community.
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Blue apatite specimen
Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F)
mineral
Fluorite
Calcium fluoride (CaF2)
mineral
Raw greenish-blue quartz-bearing mineral specimen
Likely fluorite or chalcedony/quartz; exact identification requires hardness and crystal tests
mineral
Granite
Intrusive Igneous Rock
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (containing quartz/agate or zeolite fill)
igneous
Schist
Mica Schist
metamorphic
Quartz Vein in Hematitic Siltstone
Hydrothermal Quartz (SiO2) in Ferriferous Matrix
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Limonite
FeO(OH)·nH2O
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Mica Schist or Muscovite
KAl2(AlSi3O10)(OH)2
metamorphic
Limonite with Gossan / Iron Ore
Hydrated iron oxide-hydroxide, approximately FeO(OH)·nH2O
mineral
Graphite
Graphite (Carbon, C)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
mineral
Specular Hematite
Hematite (Fe2O3)
mineral
Ironstone / Hematite
Iron(III) oxide (Fe2O3)
mineral
Celestite
Celestine (SrSO4)
mineral
Graphite
Graphite (Carbon, C)
mineral
Galena with Pyrite
Lead Sulfide (PbS) associated with Iron Sulfide (FeS2)
mineral
Feldspar
Triclinic or Monoclinic Tectosilicate (e.g., KAlSi3O8)
mineral
Chalcopyrite
CuFeS2
mineral
Hematite
Hematite (Fe2O3)
mineral
Muscovite
KAl2(AlSi3O10)(OH)2
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Basalt with Secondary Mineralization (Likely Zeolites or Calcite)
Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)
igneous
Greenschist
Chlorite Schist (Greenschist Facies)
metamorphic
Calcite
Calcium Carbonate (CaCO3)
mineral
Malachite-bearing Rock
Cu2CO3(OH)2
mineral
Copper Ore / Altered Granodiorite
Cupriferous rock with silicate gangue
mineral
Graphite
Carbon (C)
mineral
Galena
Lead Sulfide (PbS)
mineral
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Chrysotile Asbestos
Chrysotile (Mg3Si2O5(OH)4)
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
K-Feldspar (Potassium Feldspar)
Orthoclase / Microcline (KAlSi3O8)
mineral
Microcline Feldspar
KAlSi3O8
mineral
Graphite
Graphite (Carbon, C)
mineral