Lapis Lazuli
(Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2 (Complex silicate rock)
metamorphic
Category
Mineral (Evaporite)
Browse mineral (evaporite) specimens identified by the Rock Identifier community.
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Limonite with Quartz
Hydrated Iron Oxide Hydroxide, FeO(OH)·nH₂O with SiO₂
mineral
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Ruby (Raw Corundum)
Corundum (Al2O3) with Chromium traces
mineral
Desert Rose (Gypsum Rose)
Gypsum (CaSO4·2H2O) with Sand Inclusions
mineral
Schist
Schist (various mineral compositions)
Metamorphic
Pegmatite (Feldspar and Quartz)
Pegmatite (KAlSi3O8 / SiO2)
igneous
Fluorite
Calcium Fluoride (CaF2)
mineral
Granite
Intrusive Igneous Rock
igneous
Quartz-rich pegmatite (likely feldspar–quartz rock)
Granitic pegmatite; predominantly quartz (SiO₂) and feldspar, with possible mica and iron-oxide staining
igneous
Amygdaloidal Basalt with Agate/Zeolite Amygdules
Basalt (extrusive igneous rock) containing secondary mineral fillings
igneous
K-Feldspar (Potassium Feldspar / Pink Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Pegmatite
Pegmatite (felsic intrusive igneous rock)
igneous
Sandstone
Arenite (SiO2 principal composition)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Banded Gneiss
Gneiss (typically quartz, feldspar, mica, amphibole composition)
metamorphic
Tumbled basalt pebble
Basalt (fine-grained mafic volcanic rock; commonly plagioclase, pyroxene, and iron-titanium oxides)
igneous
Limonite Sandstone
Ferruginous Sandstone (Hydrated Iron Oxide)
sedimentary
Desert Rose (Gypsum Rose / Barite Rose)
Calcium Sulfate Dihydrate (CaSO4·2H2O) or Barium Sulfate (BaSO4) with Sand inclusions
mineral
Petrified Wood / Fossilized Wood
Silicified Wood (Silicon Dioxide - SiO2)
fossil
Polished orbicular jasper (likely ocean jasper or brecciated jasper)
Microcrystalline quartz (SiO₂), with iron oxides and accessory chlorite/zeolite minerals
mineral
Quartz with Calcite
Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)
mineral
Rock Specimen
Unclassified rock specimen
sedimentary
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Black Sand (Magnetite Sand)
Magnetite (Fe3O4)
mineral
Limonite Geode / Ironstone Nodule
Hydrated Iron Oxide Hydroxide (FeO(OH)·nH2O)
mineral
Milky Quartz with Algae/Chlorite
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Limonite (Ironstone)
Limonite (FeOO·nH2O)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
sedimentary
Sandstone (with Concretion)
Arenite / Quartzose Sandstone
sedimentary
Pyrite (on host rock)
Iron Sulfide (FeS2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite (Ironstone)
Goethite/Limonite (Hydrated iron(III) oxide-hydroxide)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
K-Feldspar (Potassium Feldspar)
Potassium Feldspar (KAlSi3O8)
mineral
Mica / Muscovite or Biotite
Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)
mineral
Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2)
mineral
Botryoidal Chalcedony / Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Mica (Muscovite or Biotite)
Sheet silicate mineral group (e.g., KAl2(AlSi3O10)(F,OH)2)
mineral
Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral