Sandstone
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Category
Mineral Description (Anthropogenic Material)
Browse mineral description (anthropogenic material) specimens identified by the Rock Identifier community.
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Sandstone
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Bivalve Fossil
Bivalvia (Phylum Mollusca)
Fossil
Sandstone Pebble
Quartz Arenite / Sandstone
sedimentary
Amber
Succinite (approximate formula C10H16O)
mineral
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
mineral
Quartz (worked as a tool or artifact)
Silicon Dioxide (SiO2)
mineral
Granite Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Tumbled chalcedony (likely brown agate/jasper)
Microcrystalline quartz, SiO₂; potentially iron-stained chalcedony or jasper
mineral
Diorite
Diorite (intermediate intrusive igneous rock)
igneous
Tumbled jasper, likely red/brown jasper
Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides
metamorphic
Not a geological specimen
N/A (man-made object)
N/A
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Granite Cobble
Granite (Phaneritic Igneous Rock)
igneous
Petrified Wood
Silicified Wood (SiO2)
fossil
Sandstone
Arenite
sedimentary
Gold and Silver (Metal Components of an Antique Pocket Watch)
Native Gold (Au) and Native Silver (Ag)
mineral
Sandstone
Sedimentary Rock (Quartz arenite/Arkosic sandstone)
sedimentary
Polished orange agate/jasper cabochon
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide coloration; exact variety uncertain
mineral
Polished green aventurine
Quartzite dominated by quartz (SiO₂), with green fuchsite mica or chlorite inclusions
mineral
Tumbled sodalite (probable)
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
mineral
Rose quartz
Quartz (silicon dioxide, SiO₂), pink variety
mineral
K-Feldspar (Potassium Feldspar)
Potassium Feldspar (Microcline or Orthoclase), KAlSi3O8
mineral
Dumortierite Quartz
Dumortierite in Quartz (Al6O3(BO3)(SiO4)3)
mineral
Amazonite in Quartz
K(AlSi3O8) - Potassium Feldspar with Quartz (SiO2)
mineral
Chalcedony Pebble with Jasper/Iron Oxide Cortex
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Hematite/Limonite inclusions
mineral
Chalcedony Pebble / Rough Agate
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Peridot (Olivine)
Olivine ((Mg, Fe)2SiO4)
mineral
Amber
Succinite (C10H16O)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8); variety of Orthoclase Feldspar
mineral
River Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Sandstone / Chert Gravel
SiO2 (Silicon Dioxide based clastic sedimentary rock)
sedimentary
Sandstone
Sandstone (clastic sedimentary rock composite)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Sandstone ( преимущественно SiO2 )
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz with Fe2O3 staining)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary