Quartz
Silicon Dioxide (SiO2)
mineral
Category
Manufactured Glass
Browse manufactured glass specimens identified by the Rock Identifier community.
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Quartzite pebble
Quartzite (SiO2)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Conglomerate or Gritstone)
Arenite (SiO2 based)
sedimentary
Rough Quartz (likely Rose or Smoky variant)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Quartz (Milky/Gray variety)
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Point
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (with iron oxide staining)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Pink Feldspar
Orthoclase Feldspar (KAlSi3O8)
mineral
Cloudy Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Feldspar (Microcline / Orthoclase)
Potassium Feldspar (KAlSi3O8)
mineral
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble (often referred to as 'Sea Glass' or 'River Stone' when worn smooth)
Silicon Dioxide (SiO2)
mineral
Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Man-made object (coin)
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Mineral (Synthetic - Paper and Ink Polymorph)
Synthetic Zinc/Polycarbonate Composite (Bey-specimen)
Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay
Anthropogenic Mineral Mimic
Synthetic Wolf Plush (Non-mineral)
Canis lupus similis (Prop material: Polyester & Synthetic fibers)
Synthetic material/Textile
Glazed Ceramic Tile
Fused Silicate-Clay composite
Synthetic (Man-made material mimicking natural stone)
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Polished black stone, possibly basalt or black obsidian
Likely fine-grained basalt (plagioclase and pyroxene) or volcanic glass (obsidian; rhyolitic composition)
igneous
Polished basalt pebble
Basalt; chiefly plagioclase feldspar, pyroxene, and commonly olivine
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Polished hematite
Hematite (Fe₂O₃), likely a tumbled specimen
mineral
Quartz-rich feldspathic rock, likely granite or granitic pegmatite
Granite/pegmatite composed mainly of quartz (SiO₂) and feldspar, with minor mica or iron-oxide staining
igneous
Ring with an Orange Inlay
N/A (Man-made object)
Man-made Object (Ring)