Epidote Water-Worn Pebble
Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
metamorphic
Category
Sedimentary And Metamorphic
Browse sedimentary and metamorphic specimens identified by the Rock Identifier community.
Learn about Sedimentary And Metamorphic in the encyclopedia
View all →
Jadeite Jade
Jadeite (NaAlSi2O6)
metamorphic
Epidote with quartz/feldspar
Epidote, Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Muscovite Mica
Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))
Mineral
Slate
Foliated low-grade metamorphic rock
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartz
Quartz (Silicon Dioxide - SiO2)
Mineral
Polished blue calcite sphere (tentative identification)
Calcite, CaCO₃; blue color generally results from trace impurities or inclusions
mineral
Green Calcite
Calcite (CaCO3)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Red gemstone ring, likely garnet or synthetic ruby
Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish
gemstone
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3
Mineral
Shale or Mudstone (Based on appearance)
Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)
Sedimentary
Aquamarine (Beryl)
Beryllium Aluminum Silicate - Be3Al2Si6O18
gemstone
Sapphire
Corundum (Al2O3)
mineral
Quartz (River Pebble)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Serpentinite (likely serpentinized ultramafic rock)
Serpentine-group minerals, chiefly antigorite/lizardite; commonly derived from peridotite
metamorphic
Basalt Pebble
Extrusive Igneous Rock
igneous
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
mineral
Fuchsite
Cr-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Quartz with Muscovite Mica
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride (KAl2(AlSi3O10)(F,OH)2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Green aventurine quartz (probable)
Quartz, SiO₂, with fuchsite or other green mica inclusions
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Ruby (Corundum)
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
mineral
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Laterite
Laterite (no specific mineral formula as it's a rock type)
Sedimentary
Greenstone
Metamorphic Greenstone (Greenschist facies)
metamorphic
Pyrite Schist
Metamorphic rock containing FeS2 (Pyrite) with mica and quartz
metamorphic
Greenschist
Greenschist (containing Chlorite, Epidote, and Actinolite)
metamorphic
Eclogite
Eclogite (Omphacite-Garnet Rock)
metamorphic
Quartzite with Mafic Intrusion (Gneiss/Schist Contact)
Metamorphic Quartzite (SiO2) with Amphibole/Biotite Schist
metamorphic
Yellow Beryl
Beryl (Be3Al2(SiO3)6)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Pink Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Pink Quartz
Silicon Dioxide (SiO2)
mineral
Jadeite Jade
NaAl(Si2O6)
gemstone
Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with mineral inclusions
Mineral/Mineraloid within a rock matrix
Epidote
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic