Caribbean Calcite
Calcite (CaCO3) with Aragonite (CaCO3)
mineral
Category
Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)
Browse mixed (igneous, sedimentary, metamorphic, and minerals) specimens identified by the Rock Identifier community.
Learn about Mixed (Igneous, Sedimentary, Metamorphic, And Minerals) in the encyclopedia
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Limonite (Iron Ore/Sandstone mixture)
Limonite (FeO(OH)·nH2O) often mixed with Goethite and sedimentary matrix
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Unidentified polished stone fragments
Indeterminate; likely mixed lapidary specimens, possibly jasper, agate, or quartz-bearing rock
mineral
Mixed tumbled stone collection
Assorted minerals, likely including quartz, jasper, agate, and possibly obsidian or hematite
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Copper Ore (Malachite and Azurite stained rock)
Cupriferous rock containing secondary copper carbonates
mineral
Rough Quartz (Milky / Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Red jasper (polished/cut rough)
Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Black Tourmaline (Schorl)
NaFe3Al6(BO3)3Si6O18(OH)4
Mineral
K-Feldspar (Potassium Feldspar)
Orthoclase / Microcline (KAlSi3O8)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Rounded river pebbles, likely basalt and sandstone/conglomerate
Probable basalt (dark specimen) and ferruginous sandstone or weathered conglomerate (tan specimen)
igneous and sedimentary
Rounded river pebble
Likely lithic sandstone or weathered quartz-rich rock; exact identification requires testing
sedimentary
Asphalt (Bituminous Rock)
Natural bitumen or Bituminous limestone/sandstone
sedimentary
Weathered, quartz-rich metamorphic rock (likely schist or gneiss)
Quartz–feldspar–mica schist/gneiss, with surface lichens and iron-oxide staining
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Oxide Inclusions
SiO2
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Azurite-Malachite with Limonite
Cu3(CO3)2(OH)2 (Azurite) / Cu2CO3(OH)2 (Malachite)
mineral
Tumbled quartz-rich stone, likely milky quartz
Quartz (SiO₂), possibly iron-stained milky quartz or quartzite
mineral
Limonite (Iron Ore)
Limonite (mixed iron hydroxides, primarily FeO(OH)·nH2O)
mineral
Gneiss (Metamorphic Pebble)
Gneiss (SiO2-rich metamorphic rock)
metamorphic
Mica schist (likely biotite–muscovite schist)
Mica schist; chiefly quartz and mica minerals (muscovite KAl₂(AlSi₃O₁₀)(OH)₂ and/or biotite)
metamorphic
Quartz with Iron Staining
SiO2 with Fe oxide impurities
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Foliated metamorphic rock, likely gneiss or mica schist
Quartz–feldspar–mica metamorphic rock; exact identification is uncertain from the photograph
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Conglomerate
Conglomerate
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral