Amazonite
Microcline (KAlSi3O8)
mineral
Category
Mineral, Specifically A Detrital Grain
Browse mineral, specifically a detrital grain specimens identified by the Rock Identifier community.
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Red Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Quartzite (Milky Quartz Cobble)
Silicon Dioxide (SiO2)
Metamorphic
Pink Granite
Granite (Alkali-feldspar granite)
igneous
Sandstone Beach Pebble
Clastic Sedimentary Rock (primarily Quartz with Iron Oxide coating)
sedimentary
Thunderegg (specifically a Jasper/Agate-filled Geode nodule)
Silicon Dioxide (SiO2) within Rhyolitic Matrix
igneous
Moonstone with Black Tourmaline
Feldspar (KAlSi3O8) with inclusions of Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Agate (specifically Chalcedony nodule)
Silicon Dioxide (SiO2)
mineral
Quartzite with inclusions
Quartzite (SiO2)
metamorphic
Siltstone
Siltstone (primarily SiO2 with Al2O3)
sedimentary
Blue Quartzite
Quartzite with inclusions (often Dumortierite or Magnesio-riebeckite), SiO2
metamorphic
Granite
Phaneritic plutonic igneous rock (typically 20% to 60% quartz by volume)
igneous
Porphyry
Porphyritic Andesite/Basalt
igneous
Pyrite and Sunstone
Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)
mineral
Amazonite
Microcline (K(AlSi3O8))
mineral
Pink Granite
Granite (Phaneritic Felsic Igneous Rock)
igneous
Moonstone
Orthoclase (KAlSi3O8) or Oligoclase with adularescence
gemstone
Moonstone (Feldspar)
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
Fuchsite
Chromian Muscovite, K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Granite (specifically Pink Granite)
Phaneritic Plutonic Rock (High Potassium Feldspar Granite)
igneous
Pink Granite
Granite (Felsic Plutonic Rock)
igneous
Puddingstone (specifically Michigan/Gowganda Puddingstone)
Conglomerate (Jasper Conglomerate)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 based with Fe2O3 banding)
sedimentary
Weathered sandstone or arkosic sandstone
Clastic sandstone, likely quartz–feldspar-rich (arkose)
sedimentary
Pink Granite
Phaneritic plutonic rock (Granite)
igneous
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Synthetic/Consumer Product
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Non-geological
Amber
Succinate (Fossilized Tree Resin)
fossil
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Granite
Granite, a felsic intrusive igneous rock composed chiefly of quartz, feldspar, and mica
igneous
Pink Granite
Phaneritic intrusive igneous rock with dominant Alkali Feldspar
igneous
Citrine Quartz carving
Silicon Dioxide (SiO2)
mineral
Pink Granite (Water-worn Cobble)
Granite (Alkali-feldspar granite)
igneous
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Feldspar-rich Granite (Pink Granite)
Phaneritic Felsic Igneous Rock
igneous
Schist (specifically Mica Schist)
Mica Schist
metamorphic
Banded Agate (Onyx type)
Silicon Dioxide (SiO2)
mineral
Sandstone (specifically Red Sandstone)
Arenite (primarily Quartz, SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Bornite
Bornite (Cu5FeS4)
mineral
Selenite Gypsum
Hydrous calcium sulfate (CaSO4·2H2O)
mineral