Quartz (Milky/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Synthetic Glass)
Browse mineral (synthetic glass) specimens identified by the Rock Identifier community.
Learn about Mineral (Synthetic Glass) in the encyclopedia
View all →
Tumbled chalcedony (likely moss or dendritic agate)
Microcrystalline quartz, SiO₂, with iron-oxide inclusions
mineral
Green Slag Glass
Amorphous Silica Glass (Anthropogenic)
Industrial byproduct (often mistaken for obsidian or mineral)
Pink quartz (likely rose quartz)
Quartz, silicon dioxide (SiO₂), typically massive rose quartz colored by trace elements and microscopic inclusions
mineral
Citrine (or Yellow Chalcedony / Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Hematite/Limonite inclusions
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2 + K(Al,Cr)2AlSi3O10(OH)2
mineral
Yellow Quartz (Citrine/Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Common Opal or Agate variant)
Silicon Dioxide (SiO₂)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz (Vein Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartz-rich)
Arenite
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
mineral
Granite (River Pebble)
Phaneritic intrusive igneous rock (Felsic)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Milky quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Quartz with Inclusions
Silicon Dioxide (SiO2)
mineral
Quartz Drusy on Matrix
Silicon Dioxide (SiO2)
mineral
Amethyst (Tumbled Quarz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz with Iron Oxide Inclusions
Silicon Dioxide (SiO2) with Iron Hydroxide/Oxide (Limonite/Goethite)
mineral
Pink Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pink Feldspar with Quartz
Potassium Feldspar (Orthoclase) with SiO2
igneous
Snowflake Obsidian
Volcanic glass containing Spherulitic inclusions (SiO2 + impurities)
igneous
Quartz (White/Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Smoky quartz
Quartz (SiO₂), brown-to-gray smoky variety
mineral
Lepidolite Pebble
K(Li,Al)3(Al,Si,3O10)(F,OH)2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Druzy Coating)
Silicon Dioxide (SiO2)
mineral
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Herkimer Diamond
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
White quartz pebble
Quartz (silicon dioxide, SiO₂), likely milky quartz
mineral
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Druzy
Silicon Dioxide (SiO2)
mineral