Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Category
Man Made Mineral Simulant (Glass)
Browse man made mineral simulant (glass) specimens identified by the Rock Identifier community.
Learn about Man Made Mineral Simulant (Glass) in the encyclopedia
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Titanium Quartz (Rough)
Titanium-included Silicon Dioxide (SiO2 + Ti)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Calcite with Quartz coating
Calcium Carbonate (CaCO3) with Silicon Dioxide (SiO2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Quartz (Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon dioxide (SiO2)
mineral
Sandstone (with Iron Staining)
Arenite (primarily SiO2 with Fe2O3/FeO(OH) oxides)
sedimentary
Pink feldspar fragment (probable orthoclase or microcline)
Potassium feldspar, KAlSi₃O₈
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Pumice
Pumice (Vesicular volcanic glass)
igneous
Blue chalcedony (likely dyed or coated)
Chalcedony, microcrystalline quartz (SiO₂)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Quartzite and Sandstone Pebbles
Silicon dioxide (SiO2)
metamorphic and sedimentary
Quartz (with probable host rock)
Silicon Dioxide (SiO2)
mineral
Rounded quartz-rich pebble
Likely milky quartz or quartzite (SiO₂)
mineral
Obsidian
Volcanic Glass (SiO2)
igneous
Sandstone
Sedimentary Rock (Quartz arenite or arkose)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Obsidian
Amorphous volcanic glass (70-75% SiO2)
igneous
Quartz-rich pegmatite (likely milky quartz with feldspar and mica)
Granite pegmatite; chiefly quartz (SiO₂), with feldspar and mica-group minerals
igneous
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Mahogany Obsidian
Volcanic Glass (with inclusions of Magnetite or Hematite)
igneous
Obsidian
Volcanic glass (primary composition: SiO2)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
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
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Tumbled milky quartz
Quartz (SiO₂), microcrystalline or massive variety
mineral
Tumbled brown translucent stone, likely quartz/jasper
Microcrystalline quartz (SiO₂), possibly iron-stained chalcedony or jasper
mineral
Weathered gray granitic rock
Granite, likely quartz–feldspar–mica aggregate
igneous
Quartz in Matrix (or Quartz Vein Rock)
Silicon Dioxide (SiO2) with host rock
igneous
Tumbled carnelian/chalcedony
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble (with Iron Staining)
Crystalline Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartzose Sandstone)
sedimentary