Milky quartz (rough quartz fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Category
Man Made Glass Mineral Simulant
Browse man made glass mineral simulant specimens identified by the Rock Identifier community.
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Snowflake obsidian cabochon
Obsidian (volcanic glass), SiO₂-rich; white areas are cristobalite/spherulitic devitrification
igneous
Snowflake Obsidian
Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)
igneous
Snowflake Obsidian
Volcanic glass with Spherulite inclusions (SiO2)
igneous
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Milky quartz (likely quartz-rich rock)
Quartz, silicon dioxide (SiO₂)
mineral
Citrine or Yellow Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Smoky quartz (likely)
Quartz, silicon dioxide (SiO₂), naturally irradiated variety
mineral
Snowflake Obsidian
Obsidian with Cristobalite inclusions (SiO2)
igneous
Quartz crystal
Quartz (Silicon dioxide, SiO2)
mineral
Quartz (Clear or Smoky)
Silicon Dioxide (SiO2)
mineral
Sea Glass (Frosted Quartz/Glass)
Amorphous Silicon Dioxide (SiO2)
Mineraloid
Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
sedimentary
Pink quartz (likely rose quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Botryoidal quartz (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Milky quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Snowflake Obsidian
Obsidian with Cristobalite inclusions (SiO2)
igneous
Snowflake Obsidian
Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)
igneous
Quartz
Quartz (SiO₂)
Mineral
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (mostly SiO2)
igneous
Obsidian
Obsidian (principally SiO2 - Silicon Dioxide)
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Quartz in Host Rock
Silicon Dioxide (SiO2)
mineral
Obsidian
Volcanic Glass (SiO2 + minor impurities)
igneous
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Snowflake Obsidian
Obsidian with Spherulitic Cristobalite (SiO2)
igneous
Sandstone with Iron Staining
Arenite (SiO2 with Fe2O3)
sedimentary
Tumbled blue glassy mineral, possibly sodalite or blue aventurine
Identification uncertain; likely sodalite (Na₈Al₆Si₆O₂₄Cl₂) or blue-dyed quartz/slag-like material
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Massive Quartz
Silicon dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Tumbled quartz crystal (likely smoky or iron-stained quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Polished black obsidian pyramid/block
Obsidian — natural volcanic glass, chiefly rhyolitic silica (approximately 70–75% SiO₂)
igneous
Snowflake Obsidian
Volcanic Glass (SiO2 rich with Cristobalite inclusions)
igneous
Weathered quartz-rich rock, possibly chert or milky quartz
Mostly microcrystalline or crystalline quartz (SiO₂), identification uncertain from photograph
mineral