Obsidian
Amorphous Volcanic Glass (primarily SiO2)
igneous
Category
Manufactured Glass (Simulant)
Browse manufactured glass (simulant) specimens identified by the Rock Identifier community.
Quartzite
Quartzite (Mainly SiO2)
metamorphic
Obsidian
Obsidian (Volcanic Glass, SiO2)
igneous
Quartzite / Sandstone / Chert Mix
Silicon Dioxide (SiO2)
sedimentary and metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Limestone
Calcium carbonate ( преимущественно CaCO3)
sedimentary
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Yellow Quartz Pebble (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Rose Quartz with Feldspar Inclusions
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite River Cobble
Quartzite (primarily SiO2)
metamorphic
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
sedimentary
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Common Milky Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Fluorite Tower
Fluorite (Calcium Fluoride - CaF2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 + various cementing minerals)
sedimentary
Chert (Commonly known as Flint or Jasper when pigmented)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz with Chalcedony
Silicon dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Obsidian
Volcanic glass (high silica volcanic rock)
igneous
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
mineral
Massive Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite (River Pebble)
Metamorphic rock consisting primarily of Quartz (SiO2)
metamorphic
Quartzite River Pebbles
Quartzite (primarily SiO2)
Metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Amber
Succinite (specifically for Baltic amber; fossilized tree resin)
Organic (Sedimentary-associated)
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz (Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Quartzite (Sugar Quartz)
Quartzite (primarily SiO2)
metamorphic
Fluorite (likely Green Fluorite variant)
Calcium Fluoride (CaF2)
mineral