Greenschist (Chlorite Schist)
Greenschist (Metamorphic rock dominated by chlorite, actinolite, and epidote)
metamorphic
Category
Mineral Based Human Made Alloy
Browse mineral based human made alloy specimens identified by the Rock Identifier community.
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Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Diamond
Carbon (C)
mineral
Chert Concretion (with typical hematite/limonite staining)
Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)
sedimentary
Chert (often called Flint)
Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)
sedimentary
Chert (often called Flint or Jasper based on color)
Microcrystalline Silica (SiO2)
sedimentary
Chrysocolla in Jasper (Chryso-Jasper)
Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O (Chrysocolla) + SiO2 (Jasper)
mineral
Vesicular Basalt
Basalt with vesicular texture
igneous
Schist
Mica Schist
metamorphic
Jasper Marble
Silicon Dioxide (SiO2) with Impurities
sedimentary
Mica Schist
Mica Schist (primarily Muscovite and Biotite)
metamorphic
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Muscovite Mica (Granitic Pegmatite)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Red Slag Glass
Amorphous Silica (Industrial byproduct with metallic oxide dopants)
Mineraloid / Industrial Byproduct
Banded Chert (likely Flint or Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert / Microcrystalline Quartz
Silicon Dioxide (SiO2)
sedimentary
Chert (White Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often associated with Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert Nodule (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Chert (Nodule)
Chert (composed of Microcrystalline Silica/SiO2)
sedimentary
Chert (Iron-stained)
Silicon Dioxide (SiO2)
sedimentary
Chert (with Limonite staining)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Chert (Black Chert or Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper)
Silicon dioxide (SiO2)
sedimentary
Chert (Flint Nodules)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Native Copper with Malachite/Oxide Coating
Native Copper (Cu)
mineral
Sparkling Druzy Quartz on Matrix
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Quartz (Chert/Chalcedony variant)
Silicon dioxide (SiO2)
mineral
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)
Chalcedony (Common Agate pebble)
Silicon Dioxide (SiO2)
mineral
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Diamond (or Diamond Simulant)
Carbon (C)
mineral
Rough Diamond
Diamond (Pure Carbon: C)
mineral