Land Snail Shell
Gastropoda (Calcium Carbonate, CaCO3)
fossil
Category
Man Made Metamorphic Style Composite
Browse man made metamorphic style composite specimens identified by the Rock Identifier community.
Learn about Man Made Metamorphic Style Composite in the encyclopedia
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Schist
Schist
Metamorphic
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Sandstone
Arenite
sedimentary
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Talc
Talc (Mg₃Si₄O₁₀(OH)₂)
Mineral
Pebble (likely Quartz or Chert)
SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.
Sedimentary Rock
Biotite Schist
Biotite Gneissic Schist (K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Unakite
Epidotized Granite
metamorphic
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Banded malachite cabochon
Malachite, Cu₂CO₃(OH)₂; the dark bands may be manganese-oxide or other sulfide-rich matrix, and could also indicate a composite or treated specimen
mineral
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Schist
Mica Schist (primarily consisting of muscovite, biotite, and quartz)
metamorphic
Clear quartz crystal
Quartz (silicon dioxide, SiO₂)
mineral
Obsidian (Black)
Obsidian (High-silica volcanic glass)
igneous
Milky quartz (likely quartzite or massive quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Rough Apatite in Matrix
Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)
Calcite
Mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Amphibolite with Hornblende
Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Quartz crystal cluster
Quartz (silicon dioxide, SiO₂)
mineral
Diabase (Greenstone)
Diabase (Dolerite)
igneous
Tumbled milky quartz
Quartz (SiO₂), microcrystalline or massive variety
mineral
Gneiss
Feldspathic biotite gneiss; a high-grade metamorphic rock composed mainly of quartz, feldspar, and mica
metamorphic
Quartz (pebble)
Quartz (SiO₂)
Mineral
Sandstone
Arenite
sedimentary
Greenstone
Metabasalt / Greenschist facies rock
Metamorphic
Calcite
Calcite (CaCO3)
Mineral
Quartz Crystal Cluster / Quartzite
Silicon Dioxide (SiO2)
mineral
Emerald (Rough)
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Yellow Jade
Jadeite or Nephrite (NaAlSi2O6 or Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
White Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Plagioclase Feldspar (specifically Albite/Oligoclase)
(Na,Ca)(Si,Al)4O8
mineral
Quartz
Quartz (SiO₂)
Mineral
Mica schist (possibly garnet–mica schist)
Muscovite–biotite schist; chiefly quartz, feldspar, muscovite, and biotite
metamorphic
Marble
Metamorphosed Limestone (principally CaCO3)
metamorphic
Likely polished leopard-skin jasper or brecciated jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the image alone
sedimentary
Tumbled Clear Quartz
Silicon Dioxide (SiO2)
mineral