Marble
Recrystallized Calcite (CaCO3)
metamorphic
Category
Sedimentary Or Metamorphic Derived
Browse sedimentary or metamorphic derived specimens identified by the Rock Identifier community.
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Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Carnelian
SiO2 (Silicon Dioxide with Iron Oxide impurities)
gemstone
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Mica Schist
Foliated Metamorphic Rock (Schist)
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with inclusions)
mineral
Gneis
Gneiss (High-grade metamorphic rock)
metamorphic
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Schist (Chlorite or Mica-rich)
Chlorite Schist
metamorphic
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
mineral
Adventurine (Green)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Quartz-rich limestone or calcitic marble
Calcite (CaCO₃), possibly with quartz (SiO₂)
metamorphic
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Tumbled yellow-brown quartzite or jasper
Quartzite, predominantly microcrystalline quartz (SiO₂), possibly iron-stained jasper
metamorphic
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Schist with Biotite Inclusion
Biotite-bearing Mica Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH)
mineral
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Mica Schist with Iron Staining
Mica Schist
metamorphic
Orange Quartzite (or Yellow Jasper / Carnelian Chalcedony)
Silicon Dioxide (SiO2)
metamorphic
Greenschist
Greenschist (containing Chlorite, Actinolite, and Epidote)
metamorphic
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Banded quartzite pebble
Quartzite, predominantly microcrystalline quartz (SiO₂), with a pale quartz vein or relict sedimentary band
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Gneiss with Iron Staining and Sulfide Mineralization
Metamorphic Gneiss / Amphibolite with Iron/Sulfide Oxidation
metamorphic
Jasper (Red Jasper)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Rounded quartz-rich cobble
Likely quartzite or quartz-rich sandstone; exact identification requires a fresh break or hardness test
sedimentary
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Hematite
Ferric Oxide (Fe2O3)
mineral
Rounded quartz-rich river pebble
Likely quartz-rich sandstone or quartzite pebble; composition chiefly SiO₂ with possible feldspar and mica
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Yellow Aventurine
Silicon Dioxide with inclusions (SiO2 + Muscovite/Fuchsite)
mineral
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite inclusions)
mineral
Epidote with Quartz Vein
Epidote-bearing metamorphic rock with quartz (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Polished hematite sphere
Hematite (Fe₂O₃), likely a polished specular or massive variety
mineral