Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Category
Mineral (Man Made Composite)
Browse mineral (man made composite) specimens identified by the Rock Identifier community.
Greenstone
Greenschist (metamorphosed mafic igneous rock)
metamorphic
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Snowflake Obsidian
Obsidian with Cristobalite inclusions
igneous
Chiastolite (Andalusite)
Al2SiO5
metamorphic
Milky Quartz Mineral
Quartz (Silicon Dioxide, SiO2)
mineral
Mixed Mineral Specimens
Mixed Silicates, Oxides, and Phosphates (SiO₂, Ca₅(PO₄)₃(F,Cl,OH), Na₈Al₆Si₆O₂₄Cl₂, etc.)
mineral
Gneiss (with Quartz-Feldspar vein)
Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Quartz vein in Schist
Crystalline Silicon Dioxide (SiO2) in Metamorphic Host
metamorphic
Diorite
Diorite
igneous
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)
Gneiss (complex silicate composition)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Dinosaur Bone
Agatized Dinosaur Bone
sedimentary/fossil
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral
Granite
Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)
Igneous
Garnet Schist
Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)
metamorphic
Stalagmite (Flowstone)
Speleothem (Calcium Carbonate, CaCO3)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Turquoise
Hydrated phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
mineral
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O
mineral
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Limonite (Iron Ore/Bog Iron)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Granodiorite (or Granite) Pebble
Phaneritic Felsic Igneous Pebble
igneous
Sandstone (with possibly iron oxides and other minerals)
Sandstone
Sedimentary rock
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Granite
Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)
igneous
Fire Opal
Hydrated Silica (SiO2·nH2O)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 cement)
sedimentary
Hematite Mineral Ore
Iron(III) oxide (Fe2O3)
mineral
Collection of Minerals and Ores
Various (e.g., Uraninite (U3O8), Carbon (C), Native Gold (Au), Hematite (Fe2O3), Galena (PbS), etc.)
mineral
Pearl (Biogenic Mineral)
Calcium Carbonate (primarily Aragonite) with Conchiolin; CaCO3
mineral
Pearl (as a Biogenic Mineral)
Calcium Carbonate (mostly Aragonite) with Conchiolin; CaCO3
mineral
Schist
Mica Schist
metamorphic
Granite (Fine-grained)
Phaneritic Felsic Igneous Rock
igneous
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary