Epidote
Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
mineral
Category
Sedimentary Or Igneous
Browse sedimentary or igneous specimens identified by the Rock Identifier community.
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Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Gneiss (Pebble)
Gneiss
metamorphic
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
White Agate (Chalcedony)
Agate (Silicon Dioxide - SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Gneiss (with iron staining)
Gneiss
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
White Quartz Pebbles
Quartz (Silicon Dioxide, SiO2)
Mineral
Gneiss
Gneiss
metamorphic
Quartz (Clear/White)
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Gneiss
Gneiss
metamorphic
Gneiss
High-grade regional metamorphic rock (Foliated)
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Fluorite (Blue)
Calcium Fluoride (CaF2)
mineral
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Carnelian Agate
Carnelian (SiO2 with iron oxide impurities)
mineral
Banded Agate (Pink Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphism)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Magnetite or Magnetic Iron Ore
Magnetite (Fe3O4)
mineral
Amethyst with Marcasite accents
Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)
mineral
Hematite (Tumbled)
Iron(III) oxide (Fe2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)
metamorphic
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Jasper mix)
Cryptocrystalline Sillimanite (Quartz) - SiO2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Green Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe)
sedimentary
Red Jasper (Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Rough Agate/Chert Nodules
Cryptocrystalline Quartz (SiO2)
sedimentary
Milky Quartz (Druzy Geode fragment)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (in a rock matrix)
Quartz (SiO2)
mineral
Arkosic Sandstone (or Conglomeritic Sandstone fragment)
Arkose (rich in feldspar)
sedimentary
Coarse Sand Grain / Lithic Fragment
Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)
sedimentary
Greenstone / Metagraywacke
Metamorphosed basaltic or sedimentary rock (Complex Silicate)
metamorphic