Lapis Lazuli
Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)
metamorphic
Category
Mineral Composite
Browse mineral composite specimens identified by the Rock Identifier community.
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Lapis Lazuli (Raw)
Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S
metamorphic
Microcline Feldspar (Amazonite or White Feldspar)
KAlSi3O8
mineral
Small pale mineral fragment
Unidentified; possibly quartz, calcite, or feldspar
mineral
Sedimentary Sandstone with Iron Oxide
Ferruginous Sandstone
sedimentary
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Orthoclase Feldspar (Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Red Sandstone
Ferruginous Sandstone (SiO2 dominated with Fe2O3 cement)
sedimentary
Raw greenish-blue quartz-bearing mineral specimen
Likely fluorite or chalcedony/quartz; exact identification requires hardness and crystal tests
mineral
Fossil Shell
Invertebrate fossil (Mollusca)
fossil
Granite Pebble
Intrusive Igneous Rock
igneous
Amethyst
Quartz (Silicon Dioxide, SiO2)
gemstone
Basalt with Secondary Mineralization (Likely Zeolites or Calcite)
Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Unknown Rock Fragment
Unknown
unknown
Bauxite
Aluminum ore (mixture of gibbsite Al(OH)3, boehmite γ-AlO(OH), and diaspore α-AlO(OH))
sedimentary
Bauxite
Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)
sedimentary
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Tumbled Mixed Gemstones and Rocks
Various mineral species including quartz (SiO2) and silicate minerals
mineral
Satin Spar (Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Limonite / Ironstone
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
mineral
Fluorite (Fluor-spar)
Calcium Fluoride (CaF2)
mineral
Fluorite with Quartz
Fluorite (CaF2) and Quartz (SiO2)
mineral
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
mineral
Sandstone
Sedimentary Clastic Rock
sedimentary
Limonite (Ironstone)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Schist
Mica Schist
metamorphic
Sandstone
Clastic Sedimentary Rock
sedimentary
Quartz in Limonite-rich Matrix
Silicon Dioxide (SiO2) with Goethite/Limonite FeO(OH)·nH2O
Mineral in Sedimentary/Secondary host
Granite
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Magnetite (Lodestone)
Iron(II,III) oxide (Fe3O4)
mineral
Granite
Granite
Igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (containing quartz/agate or zeolite fill)
igneous
Shale
Shale (clastic sedimentary rock)
Sedimentary