Fluorite
Fluorite (CaF₂)
mineral
Category
Metamorphic Or Sedimentary Depending On Local Grade
Browse metamorphic or sedimentary depending on local grade specimens identified by the Rock Identifier community.
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Gneiss (River Cobble)
Gneiss (Foliated Metamorphic Rock)
metamorphic
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Schist (Micaceous Schist)
Schist (containing mainly Muscovite and Quartz)
metamorphic
Ruby in Kyanite
Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)
metamorphic
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Foliated Gneiss (River-Worn Pebble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Hematite / Jasper
Iron(III) oxide (Fe2O3) in Quartz (SiO2)
mineral / sedimentary
Muscovite Mica
Muscovite (Potassium Aluminum Silicate Hydroxide Fluoride), KAl2(AlSi3O10)(OH,F)2
mineral
Diamond
C (Carbon)
mineral
Marble
Marble (primarily Calcite, CaCO3 or Dolomite, CaMg(CO3)2)
Metamorphic Rock
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Rough Diamond
Diamond (pure carbon / C)
mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Banded Gneiss with Quartz Vein
Gneiss containing SiO2 (Quartz) intrusion
metamorphic
Gneiss
Gneiss
metamorphic
Greenstone / River Siltstone
Metasedimentary Greenstone (Chlorite-rich Siltstone)
metamorphic
Gneiss (Granite Gneiss)
Gneiss
metamorphic
Gneiss (Metamorphosed Pebble)
Gneiss with Quartz/Feldspar banding
metamorphic
Granite Gneiss
Gneiss (Polymetamorphic Quartz-Feldspar-Mica rock)
metamorphic
Gneiss
Gneiss
metamorphic
Green Slate (Greenstone)
Foliated Metamorphic Rock (rich in Chlorite/Epidote)
metamorphic
Schist with Biotite Inclusion
Biotite-bearing Mica Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic sedimentary rock)
sedimentary
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Gneiss (Cobble)
Gneiss
metamorphic
Gneiss (with Quartz-Feldspar vein)
Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)
metamorphic
Gneiss
Gneiss
metamorphic
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Agate
Agate (Varietal form of Chalcedony/Quartz, SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
mineral (man-made aura treatment)