Aquamarine
Beryl (Be3Al2Si6O18), specifically the blue-green variety
Mineral
Category
Mineral, Specifically A Detrital Grain
Browse mineral, specifically a detrital grain specimens identified by the Rock Identifier community.
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Pink Granite
Felsic intrusive igneous rock (Granite)
igneous
Pink Granite (River Pebble)
Felsic Intrusive Igneous Rock
igneous
Fuchsite
Cr-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Sandstone (Ferruginous)
Arenite (Iron-rich)
sedimentary
N/A - Image does not contain a rock or mineral
Anthropogenic textile material
Non-geological
Greenstone Porphyry
Porphyritic Metavolcanic Rock
igneous
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Mineral
Black Veined Jasper (Spiderweb Jasper)
Silicon Dioxide (SiO2)
sedimentary
Jasper (specifically Red Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Weathered Sandstone Cobble
Arenite / Quartz Sandstone
sedimentary
Chalcedony
Silicon Dioxide (SiO2)
mineral
Granite (specifically Pink or Alkali Feldspar Granite)
Felsic Plutonic Rock (primarily SiO2 with KAlSi3O8)
igneous
Amber
Succinate (Fossilized Tree Resin)
fossil
Strawberry Quartz
Quartz with Hematite inclusions (SiO2 + Fe2O3)
mineral
Moonstone with Black Tourmaline
Feldspar (KAlSi3O8) with inclusions of Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Aragonite Star Cluster
Aragonite (CaCO3)
mineral
Buffalo Nickel (Indian Head Nickel)
Cupronickel (75% Copper, 25% Nickel)
mineral (processed alloy)
Pink Granite
Phaneritic Igneous Rock (Quartz-Feldspar dominant)
igneous
Pyrite and Sunstone
Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)
mineral
Amazonite
Microcline (K(AlSi3O8))
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Porphyritic Basalt or Diabase with Plagioclase Phenocrysts
Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar
Igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pink Granite
Granite (Alkali-feldspar granite)
igneous
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Blue Topaz
Aluminum Silicate Fluoride Hydroxide - Al2SiO4(F,OH)2
gemstone
Banded Agate (Onyx type)
Silicon Dioxide (SiO2)
mineral
Amazonite
Microcline (KAlSi3O8)
mineral
Gneiss (specifically Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Porphyritic Andesite
Andesite (Porphyry)
igneous
Jasper Conglomerate
Polymictic Conglomerate with Jasper and Quartz
sedimentary
Stromatolite
Biogenic Sedimentary Rock (composed predominantly of CaCO3)
sedimentary
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
Moonstone
Orthoclase (KAlSi3O8) or Oligoclase with adularescence
gemstone
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Sandstone
Arenite (SiO2 principal composition)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Agate (specifically Chalcedony nodule)
Silicon Dioxide (SiO2)
mineral
Granite (Pink Orthoclase variety)
Phaneritic intrusive igneous rock (Quartz, Orthoclase, Plagioclase, and Mica)
igneous