Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Category
Igneous, Sedimentary, Metamorphic
Browse igneous, sedimentary, metamorphic specimens identified by the Rock Identifier community.
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Small quartz-rich pebble or rock fragment
Quartz (silicon dioxide, SiO₂), possibly with iron-oxide staining or host-rock inclusions
mineral
Labradorite (a variety of Feldspar)
Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)
igneous
Fuchsite (Green Muscovite / Mica Schist)
Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Magnetite (Lodestone)
Iron(II,III) oxide (Fe3O4)
mineral
Kaolinite (Kaolin)
Kaolinite (Al2Si2O5(OH)4)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Graphite
Graphite (Carbon, C)
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Graphite
Graphite (Native Carbon), Formula: C
Metamorphic
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock
igneous
Weathered schist or gneiss fragment
Quartz–feldspar–mica metamorphic rock; likely mica schist or gneiss
metamorphic
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Schist
Metamorphic Rock (Schist)
metamorphic
Magnetite-rich ironstone (probable magnetite ore)
Magnetite, Fe₃O₄, likely in a fine-grained ironstone matrix
mineral
Weathered quartz-bearing rock, possibly calcite vein fragment
Indeterminate; likely quartz (SiO₂) with carbonate minerals such as calcite (CaCO₃)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Dark rounded pebble
Likely basalt or another fine-grained mafic volcanic rock; exact identification is uncertain from the image
igneous
Quartz (likely Rose or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Quartzite / Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Milky)
Silicon Dioxide (SiO2)
mineral
Golden Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz with inclusions
SiO2
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz fragment
Quartz (silicon dioxide, SiO₂), likely milky or smoky quartz
mineral
Quartz (Milk or Clear Variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebbles
Silicon Dioxide (SiO2)
mineral
Quartz (White/Milky)
Silicon Dioxide (SiO2)
mineral
Magnetite / Ironstone Pebble
Magnetite (Fe3O4)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Collection of Minerals and Ores
Various (e.g., Uraninite (U3O8), Carbon (C), Native Gold (Au), Hematite (Fe2O3), Galena (PbS), etc.)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Small white mineral fragment
Indeterminate; possibly quartz, calcite, or feldspar
mineral