Blue Kyanite
Kyanite (Al2SiO5)
mineral
Category
Sedimentary Or Metamorphic (Low Grade)
Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.
Learn about Sedimentary Or Metamorphic (Low Grade) in the encyclopedia
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Garnet
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Mica Schist with Vein
Mica Schist
metamorphic
Banded River Cobble with Mafic Dike
Hydrothermally altered Graywacke or Sandstone with Mafic Intrusion
igneous and sedimentary
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Chalcedony Pebble / Rough Agate
Silicon Dioxide (SiO2)
mineral
Tumbled orange chalcedony and a gray stone disk
Chalcedony (microcrystalline quartz, SiO₂); disk likely fine-grained sandstone or slate
mineral
Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Cubic Zirconia (Simulated Diamond)
Zirconium dioxide (ZrO2)
mineral
Quartz Crystal (specifically a Double-Terminated variety)
Silicon Dioxide (SiO2) - Low Quartz
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Jadeite (Nephrite)
Ca2(Mg,Fe)5Si8O22(OH)2
metamorphic
Green Jade (Tumbled)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
mineral
Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Jade Ring
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
gemstone
Jadeite (Jade)
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Sulfur on Aragonite
Sulfur (S) on Aragonite (CaCO3)
mineral
Prehnite
Calcium aluminum silicate hydroxide, Ca2Al(AlSi3O10)(OH)2
mineral
White Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Weathered quartzite cobble
Quartzite, predominantly crystalline SiO₂
metamorphic
Feldspathic Gneiss
Feldspathic Gneiss (High-grade regional metamorphic rock)
metamorphic
Mica Schist
Schist (muscovite-biotite rich)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled yellow quartz
Quartz (SiO₂), likely iron-stained milky quartz or pale citrine
mineral
Bull Quartz (Milky Quartz)
Quartz (Silicon Dioxide - SiO2)
mineral
Yellow Quartz / Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Weathered quartz-rich rock, possibly milky quartz or quartz-bearing granite
Quartz (SiO₂), potentially with feldspar and iron-oxide staining
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
Mineral
Pearl (Imitation or Cultured)
Calcium Carbonate (Aragonite/Calcite) - CaCO3
Mineraloid (Organic)
Black Tourmaline (Schorl)
NaFe2+3Al6(BO3)3Si6O18(OH)4
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral