Weathered granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Category
Mineral, Specifically A Detrital Grain
Browse mineral, specifically a detrital grain specimens identified by the Rock Identifier community.
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Agate (Polished Sphere)
Silicon Dioxide (SiO2)
mineral
Bumblebee Jasper
Anhydrite with Sulfur, Hematite, and Orpiment (SiO2/CaSO4 mixture)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pink Granite
Intrusive Igneous Rock (Granitic)
igneous
Pink Granite
Felsic intrusive igneous rock (Granite)
igneous
Pink Granite (River Pebble)
Felsic Intrusive Igneous Rock
igneous
Pink Granite
Granite (Felsic intrusive igneous rock)
igneous
Granite (specifically Pink or Alkali Feldspar Granite)
Felsic Plutonic Rock (primarily SiO2 with KAlSi3O8)
igneous
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Larimar
Blue Pectolite (NaCa2Si3O8(OH))
mineral
Amazonite
Microcline (KAlSi3O8)
mineral
Blue Quartz (Dumortierite Quartz)
SiO2 with inclusion of AlAl6BSi3O18
mineral
Amethyst (Rough)
Silicon Dioxide with iron impurities (SiO2)
mineral
Granite (specifically Brown Granite Countertop)
Phaneritic Felsic Igneous Rock (Granite-Gabbro series)
igneous
Prehnite
Ca2Al(AlSi3O10)(OH)2
mineral
Fossilized Shark Tooth
Carcharocles or Otodus sp. (Micro-fossilized)
sedimentary
Jasper Conglomerate
Polymictic Conglomerate with Jasper and Quartz
sedimentary
Stromatolite
Biogenic Sedimentary Rock (composed predominantly of CaCO3)
sedimentary
Basalt
Mafic volcanic rock
igneous
Pearl
Calcium carbonate (CaCO3) + organic conchiolin (Biogenic Mineral)
mineral
Pink Granite
Felsic Plutonic Rock
igneous
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
Igneous
Dyed Blue Agate
Silicon dioxide (SiO2) with artificial pigment
mineral
Citrine or Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Moonstone (Grey)
Feldspar (variety Orthoclase/Adularia) with the formula (K,Na)AlSi3O8
mineral
Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Greenstone Porphyry
Porphyritic Metavolcanic Rock
igneous
Amazonite
Amazonite (KAlSi3O8)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Pink Granite
Phaneritic Plutonic Felsic Rock (Granite)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Tourmalinated Quartz
Silicon dioxide (SiO2) with inclusions of Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
mineral
Green Aventurine
Quartz with fuchsite inclusions (SiO2)
mineral
Labradorite
(Ca, Na)(Al, Si)4O8
mineral
Pink Granite
Phaneritic Igneous Rock (Quartz-Feldspar dominant)
igneous
Basalt or Slag
Extrusive Igneous Rock / Industrial Slag
igneous
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Amazonite
Microcline (K(AlSi3O8))
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Porphyry (specifically Porphyritic Andesite / Rhyolite)
Porphyritic Igneous Rock
igneous