Sandstone
Clastic sedimentary rock
Category
Browse man made glass mineral simulant specimens identified by the Rock Identifier community.
Sandstone
Clastic sedimentary rock
Sandstone Pebble
Sandstone (primarily SiO2)
Sandstone
Arenite (SiO2 principal)
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
Sandstone
Arenite (SiO2 predominantly)
Epidote with Quartz and Feldspar
Ca2(Al2,Fe3+)(SiO4)3(OH) (Epidote complex)
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
Chert Pebble (Water-worn Quartz/Chalcedony)
Silicon Dioxide (SiO2)
Quartzite
Quartzite (primarily SiO2)
Mixed tumbled stone collection
Assorted minerals, likely including quartz, jasper, agate, and possibly obsidian or hematite
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
White Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
Purple fluorite specimen
Fluorite (calcium fluoride, CaF₂)
Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Iron-stained Quartzite / Chert
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
Green Aventurine
Quartz (SiO2) containing Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
Sandstone Cobble
Arenite (Sandstone)
Clear Quartz
Silicon Dioxide (SiO2)
Smoky Quartz (Chlorite Inclusions)
Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation
Pegmatitic quartz–feldspar rock with dark mica
Granitic pegmatite; quartz (SiO₂), feldspar, and biotite mica
Quartz with Mafic Inclusions
Silicon Dioxide (SiO2) with host igneous matrix
Green fluorite (likely)
Fluorite, calcium fluoride (CaF₂)
Granite
Granite (Felsic Plutonic Rock)
Ferruginous Quartz (Iron-Stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Blue-green fluorite (likely tumbled/polished)
Fluorite, calcium fluoride (CaF₂)
Petrified Wood
Silicified Wood (Permineralized organic tissue)
Quartz with mica and feldspar (Pegmatite fragment)
Granitic Pegmatite (composed mainly of SiO2 with KAlSi3O8)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Fluorite
Calcium Fluoride (CaF2)
Quartz Pebble
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Polished porphyritic basalt (likely)
Basalt, a fine-grained mafic volcanic rock; visible inclusions may be olivine, feldspar, or vesicle infillings
Quartz pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
Faceted Quartz (Rock Crystal)
Crystalline Silicon Dioxide (SiO2)
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Small rounded quartz pebble
Quartz (SiO₂), likely milky or iron-stained quartz