Granite
Phaneritic Felsic Igneous Rock
igneous
Category
Metamorphic Or Igneous (Context Dependent)
Browse metamorphic or igneous (context dependent) specimens identified by the Rock Identifier community.
Learn about Metamorphic Or Igneous (Context Dependent) in the encyclopedia
View all →
Likely garnet-bearing metamorphic fragment
Uncertain; possibly almandine garnet in mica schist or amphibolite
metamorphic
Granite
Granite (Felsic intrusive igneous rock)
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Granitoid (Granite/Gneiss)
Granitoid silicate rock, primarily quartz and feldspar
igneous/metamorphic
Red jasper in a gray host rock (likely jasperized volcanic rock)
Microcrystalline quartz (SiO₂), iron-oxide–colored jasper, in a fine-grained volcanic or sedimentary matrix
metamorphic
Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Quartz-rich rock fragment
Unidentified quartz–feldspar-rich rock; exact lithology cannot be determined from the image
igneous
Granite (River-worn)
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Diorite
Phaneritic intermediate plutonic rock
igneous
Pyrite
Pyrite (FeS₂)
Mineral
Granodiorite
Granodiorite (containing Plagioclase, Quartz, and Biotite)
igneous
Granodiorite
Granodiorite
igneous
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Emerald
Beryl (Be3Al2(SiO3)6)
gemstone
Pyrite
Iron Sulfide (FeS2)
mineral
Dearest Jewelry (Multigemstone)
Combination of Diamond (C), Emerald (Be3Al2Si6O18), Amethyst/Rock Crystal (SiO2), Ruby (Al2O3), Emerald (Be3Al2Si6O18), Sapphire (Al2O3), and Topaz (Al2SiO4(F,OH)2)
Mineral
Granite
Phaneritic Igneous Rock (Granite)
igneous
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Pink-orange quartz-rich rock, likely rhyolite or jasper
Probable rhyolite (microcrystalline quartz and feldspar), possibly jasper/chalcedony
igneous
Quartz Vein / Quartzite Specimens
Silicon Dioxide (SiO2)
mineral
Greenstone, likely serpentinite
Serpentinite; predominantly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, chlorite, and talc
metamorphic
Hypersthene
(Mg,Fe)SiO3 - Enstatite-Ferrosilite series
mineral
Granite
Phaneritic plutonic rock (primarily Quartz, Alkali Feldspar, and Plagioclase)
igneous
Quartz with Sulfide Inclusions
Silicon Dioxide (SiO2) with metallic mineral inclusions
mineral
Quartz with Host Rock Matrix
Silicon Dioxide (SiO2)
mineral
Sandstone or Quartzite with algae
Unknown specific, largely SiO2 with biological growth
sedimentary or metamorphic
Wishing Rock (Quartz Vein in Host Rock)
Silicon dioxide (SiO2) vein in various host rocks
Igneous/Sedimentary/Metamorphic with Mineral Vein
Vesicular Basalt
Aphanitic Mafic Volcanic Rock
igneous
Green fluorite (likely)
Fluorite, calcium fluoride (CaF₂)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Tumbled chalcedony or quartzite pebble
Microcrystalline quartz (SiO₂), likely chalcedony; exact identification requires testing
mineral
Grey Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Quartz-rich pegmatite with green epidote or chlorite
Pegmatitic quartz–feldspar rock, likely containing epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH)) and/or chlorite
igneous
Vesicular volcanic rock, likely pumice or scoria
Vesicular rhyolitic–andesitic volcanic rock; predominantly silicate glass with feldspar and possibly pyroxene
igneous
Leopard Skin Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Unidentified small brown rock
Undetermined; image does not show enough detail for reliable identification
sedimentary
Polished labradorite
Labradorite, calcium-rich plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈
mineral
Polished labradorite slab
Labradorite, a calcium-rich plagioclase feldspar (approximately (Ca,Na)(Al,Si)₄O₈)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Dumortierite Quartz
Dumortierite-bearing Quartz (SiO2 with Al7BO3(SiO4)3O3)
mineral