Quartz with Epidote
Silicon dioxide (SiO2) with Calcium aluminum iron silicate (Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))
mineral
Category
Metamorphic
Browse metamorphic specimens identified by the Rock Identifier community.
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Banded gneissic rock
Gneiss, likely quartz–feldspar–biotite gneiss
metamorphic
Greenschist
Chlorite schist
metamorphic
White quartz pebble (probable)
Quartz, silicon dioxide (SiO₂)
mineral
Ruby in Zoisite (Anyolite)
Ruby-Zoisite
metamorphic
Blue Apatite
Calcium phosphate mineral, Ca5(PO4)3(F,Cl,OH)
mineral
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Blue Quartz (Dumortierite Quartz)
SiO2 with inclusions of AlAl6BSi3O18
mineral
Dumortierite Quartz
Dumortierite (Al7BO3(SiO4)3O3 / inclusion in SiO2)
metamorphic
Emerald in Matrix (Quartz/Schist)
Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities
mineral
Specular Hematite
Specularite (Fe2O3)
mineral
Quartzite
Quartzite
metamorphic
Quartzite (River Stone)
Metamorphic Quartz (SiO2)
metamorphic
Fossilized marine shell fragment
Likely a bivalve or gastropod shell preserved as calcite (CaCO₃)
fossil
Small quartz-rich mineral fragment
Quartz (SiO₂), possibly milky or chalcedonic quartz
mineral
Schist
Schist
Metamorphic
Iolite (Cordierite)
Cordierite (Magnesium Aluminum Silicate), Mg2Al4Si5O18
Mineral
Quartz
Silicon dioxide (SiO2)
mineral
Rounded dark metamorphic pebble
Likely mica schist or chlorite-rich greenschist; exact identification requires testing
metamorphic
Fuchsite
Chromium-rich Muscovite Mica
mineral
Epidote-bearing Rock
Epidote / Silicate mineral aggregate
metamorphic
Rhodonite
Rhodonite (MnSiO₃), a manganese inosilicate
mineral
Raw Emerald (Emerald Beryl)
Beryl (Be3Al2Si6O18) with chromium/vanadium impurities
mineral
Tumbled jade-like stone, likely jadeite or nephrite
Jadeite (NaAlSi₂O₆) or nephrite, a fibrous amphibole aggregate
mineral
Polished/tumbled rhodonite-rich stone
Rhodonite (MnSiO₃), likely mixed with quartz and manganese oxides
metamorphic
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Mica schist fragment
Biotite–quartz–feldspar schist
metamorphic
Banded gneiss (likely garnet-biotite or quartz-feldspar gneiss)
Gneiss; predominantly quartz (SiO₂), feldspar, and dark biotite/amphibole
metamorphic
Dumortierite Quartz
Dumortierite (Al7BO3(SiO4)3O3) within Quartz (SiO2)
igneous
Quartz pebble
Silicon dioxide (SiO2)
mineral
Clear Quartz
SiO2 (Silicon Dioxide)
gemstone
Pink Quartz
Silicon Dioxide (Quartz), SiO2
mineral
Aquamarine in Onyx / Blue Topaz Pendant
Beryl (Be₃Al₂Si₆O₁₈) or Topaz (Al₂SiO₄(F,OH)₂)
gemstone
Mica
Mica group (often Muscovite or Biotite)
mineral
Polished Stone Pendant (Identity Unclear)
Unknown (Possibly Jasper/Agate/Quartz mixture)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Sapphire or Citrine
Al2O3 (Corundum) or SiO2 (Quartz)
mineral
Green Tourmaline
Elbaite (part of Tourmaline group), Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4
mineral
Red Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Garnet
Almandine Garnet (Fe3Al2(SiO4)3)
mineral