Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Category
Mineral (Pseudomorph)
Browse mineral (pseudomorph) specimens identified by the Rock Identifier community.
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Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)
Igneous
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3 iron oxide staining)
sedimentary
Fluorite (Purple variety)
Calcium Fluoride (CaF2)
mineral
Quartz Vein in Basalt or Slate
Hydrothermal quartz vein traversing mafic host rock
metamorphic
Sedimentary Pebble
Sedimentary Rock Fragment
sedimentary
Tumbled ocean jasper or orbicular jasper
Microcrystalline quartz (SiO₂), commonly with chalcedony, feldspar, and iron-oxide inclusions
mineral
Breccia
Breccia (Sedimentary Clastic Rock)
sedimentary
Banded Sandstone
Clastic Sedimentary Rock (Quartz Arenite)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Tourmalinated Quartz / Tourmaline in Matrix
Silicate mineral group (Schorl / Quartz)
mineral
Blue Lace Agate (Tumbled)
Silicon Dioxide (SiO2) with trace minerals
mineral
Included Quartz (Garden Quartz / Lodolite)
Quartz (SiO2) with various mineral inclusions
Mineral
Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions
Mineral
Moss Agate
Silicon dioxide (SiO2) with mineral inclusions
Mineral
Beryl (Emerald variety in host rock)
Be3Al2(SiO3)6 (Silicate mineral)
mineral
Schist
Chlorite/Mica Schist
metamorphic
Amazonite
Potassium Feldspar (KAlSi3O8)
Mineral
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Granite
Plutonic Igneous Rock
igneous
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Basalt
Extrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Granite
igneous
Granite
Felsic intrusive igneous rock
igneous
K-Feldspar Granite Fragment
Granite (Alkali Feldspar-rich)
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Tumbled Stone
Silicon dioxide / Various silicates
mineral
Granite
Intrusive Igneous Rock
igneous
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Quartz Sand (Beach Sand)
Silicon Dioxide (SiO2)
sedimentary
Gneiss
Metamorphic Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
River Pebble (Grantoid/Quartzite)
Quartz-rich igneous rock (Granitoid)
igneous