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N/A
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Mineral Specimen
Browse mineral specimen specimens identified by the Rock Identifier community.
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Fluorite
Calcium Fluoride (CaF2)
mineral
Not a rock, mineral, or geological specimen
N/A
Unable to Identify (Image Obscured)
Indeterminate
Quartz geode or druzy quartz specimen
Quartz, silicon dioxide (SiO₂), likely microcrystalline/drusy quartz coating a host rock
mineral
Quartz in Greenstone
Metamorphic rock with quartz vein (SiO2 / mixed silicates)
metamorphic
Clear Quartz
SiO2 (Silicon Dioxide)
gemstone
Fluorite on Matrix
Calcium Fluoride (CaF2)
mineral
Copper Ore (Malachite and Limonite bearing rock)
Copper-bearing rock with secondary copper minerals
mineral
Copper-bearing Quartz Vein in Host Rock
Quartz with Malachite/Chrysocolla staining
igneous/metamorphic with mineral
Epidosite with Quartz (Unakite-variant or Jasper)
Epidotized Metasomatite
metamorphic
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Pyrite with Quartz
Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)
mineral
N/A - Non-Geological Item
not a rock/mineral
Fossilized Bivalve Shell
Bivalvia (fossil specimen)
sedimentary
Vesicular Basalt / Scoria pebble
Extrusive igneous rock with amygdaloidal infilling
igneous
Quartz Geode with Goethite/Hematite
Silicon Dioxide (SiO2) with Iron Oxides
mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Quartz with Feldspar Veining
Silica (SiO2) with Potassium Feldspar (KAlSi3O8) inclusions
mineral
Quartzite with Hematite staining
Quartzite (SiO2)
metamorphic
Quartz with Mica/Schist inclusion
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Tiger's Eye
Quartz pseudomorph after crocidolite (SiO2)
gemstone
Veined Sandstone with Calcite Veins
Sedimentary sandstone with hydrothermal/mineral veins
sedimentary
Wavellite with Quartz
Al3(PO4)2(OH,F)3 & SiO2
mineral
Azurite Malachite
Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)
mineral
Unidentified Dark Mineral or Rock
Indeterminate (Likely Silicon Dioxide or Carbon-based)
mineral
Quartz Geode
Silicon dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Fragmented Sedimentary Pebble
Clastic Sedimentary Specimen
sedimentary
Granite
Granite (composed mainly of Quartz, Potassium Feldspar, Plagioclase, and Biotite/Mica)
igneous
Peacock Ore (Bornite or Iridescent Chalcopyrite)
Bornite (Cu5FeS4) or Acid-treated Chalcopyrite (CuFeS2)
mineral
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Basalt with Secondary Mineralization (Likely Zeolites or Calcite)
Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)
igneous
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
N/A (Non-Geological Specimen)
N/A
Sandstone with Quartz Vein
Arenite with SiO2 intrusion
sedimentary
Sandstone Concretion
Sedimentary Concretion (Quartz sand bound by mineral cement)
sedimentary
Small rounded pebble, likely quartz-rich stone
Indeterminate from photograph; possibly microcrystalline quartz (SiO₂) or a weathered silicate pebble
mineral
Chert (with potential fossil inclusion)
Microcrystalline Quartz (SiO2)
sedimentary
Glauconitic Sandstone (or Greenstone)
Glauconitic Sandstone with Quartz
sedimentary
Limonite Ironstone
Goethite-Limonite concretion / Iron oxide
sedimentary
Boxwork Siderite or Sepatarian Nodule Weathering
Siderite (FeCO3) with secondary mineralization or Boxwork Geode fragment
sedimentary