Snowflake Obsidian
Spherulitic Obsidian (Amorphous Volcanic Glass with Cristobalite inclusions)
igneous
Category
Mineral Simulant (Synthetic Glass)
Browse mineral simulant (synthetic glass) specimens identified by the Rock Identifier community.
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Quartz with Muscovite Mica
SiO2 with KAl2(AlSi3O10)(OH)2
mineral group
Obsidian
Obsidian (Volcanic glass, primarily SiO2)
igneous
Feldspar in Matrix
Feldspar group minerals in metamorphic or igneous matrix
igneous
Muscovite Mica Schist
Muscovite Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Muscovite Schist
Mica Schist (primarily KAl2(AlSi3O10)(OH)2)
metamorphic
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Synthetic material (Not a natural rock/mineral)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Fluorite and Mineral Collection
Calcium Fluoride (CaF2)
mineral
Snowflake Obsidian
Volcanic Glass with Cristobalite inclusions
igneous
Blue goldstone beads
Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli
mineral
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Glass
Amorphous Silicon Dioxide (SiO2)
mineraloid
Snowflake obsidian cabochon
Obsidian (volcanic glass), SiO₂-rich; white areas are cristobalite/spherulitic devitrification
igneous
Obsidian
Volcanic Glass (SiO2)
igneous
Snowflake Obsidian
Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)
igneous
Quartz Vein Rock
Silicon dioxide (SiO2) within a host rock matrix
mineral
Snowflake Obsidian
Volcanic glass with Spherulite inclusions (SiO2)
igneous
Quartz Mineral Specimens
Quartz (Silicon Dioxide, SiO2)
mineral
Man-made earbud charging case (Not a rock or mineral)
Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components
Synthetic/Man-made object
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Blue slag glass or dyed glass-like industrial material
Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass
mineral
Cobalt Blue Glass / Cullet Glass
Silicon dioxide (Amorphous man-made glass)
mineral
Blue Slag Glass
Man-made Silicon Dioxide (Amorphous)
Anthropogenic (Man-made)
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Blue Glass or Slag Glass
Amorphous Silica (Anthropogenic Glass)
mineral
Aura Quartz (Titanium/Rainbow Quartz)
SiO2 (Silicon Dioxide) with metallic coating
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Pink Quartz / Sea Glass
Silicon Dioxide (SiO2)
mineral
Mica (Muscovite)
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Muscovite Mica in Quartz Matrix
Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)
mineral
Blue Slag Glass
Amorphous Silica (Industrial byproduct)
Antropogenic (Man-made glass byproduct)
Amethyst (Raw Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Snowflake Obsidian
Obsidian with Cristobalite inclusions (SiO2)
igneous
Ceramic or Polished Stone Heart (Anthropogenic Material)
Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)
Synthetic/Anthropogenic Mineraloid
Man-made Blank Ammunition (Brass)
CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)
Anticrystalline / Synthetic Alloy
Oak-grain Laminate (Industrial/Decorative Furniture Finish)
Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)
not a rock (synthetic material)
Textile (Upholstery Fabric)
Woven Polyethylene/Polyester or Cotton Blend
Synthetic or Natural Fiber
Bowling Ball (Brunswick T-Zone Deep Space)
Polyester resin / Polyurethane polymer
Synthetic (not a natural rock)
Quartz (Smoky/Brown variety)
Silicon dioxide (SiO2)
mineral
Sea Glass (Frosted Quartz/Glass)
Amorphous Silicon Dioxide (SiO2)
Mineraloid
Obsidian
Volcanic glass (Mainly SiO2)
igneous