Beryl (Aquamarine)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Category
Man Made Silicate (Anthropogenic Glass)
Browse man made silicate (anthropogenic glass) specimens identified by the Rock Identifier community.
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Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
gemstone
Mixed Quartz and River Pebbles (Stone Collection)
Mixed assortment containing mainly Silicon Dioxide (SiO2)
igneous, sedimentary, metamorphic, and mineral
Chert or Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Metamorphic Quartz Sandstone
metamorphic
Yellow Quartzite
Quartzite (primarily Silicon Dioxide - SiO2)
metamorphic
Tektite
Natural impact glass
meteorite
Likely polished black-and-white stone fragment
Indeterminate from image; possibly tourmalinated quartz, black-and-white jasper, or coated stone
mineral
Smooth river pebble, likely quartz-rich sandstone or quartzite
Probable quartz arenite (sandstone) or quartzite; mainly SiO₂ with minor iron-bearing minerals
sedimentary/metamorphic
Flint
SiO2 (Cryptocrystalline Quartz)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Blue faceted gemstone, likely synthetic sapphire or blue glass
Corundum (Al₂O₃) if sapphire; identity cannot be confirmed visually
gemstone
Goldstone (likely blue-free synthetic goldstone pendant)
Synthetic aventurine glass; silica glass with dispersed metallic copper crystals
mineral
Black Chert River Stone
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Yellow faceted gemstone, likely citrine or yellow sapphire
Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)
gemstone
Quartz with impurities or Host Rock
SiO2 (Silicon Dioxide) with mixed silicates
mineral
Pearl
Biogenic CaCO3 (Aragonite and Calcite)
mineral
Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Goldstone
Aventurine Glass (SiO2 + Cu small inclusions)
man-made glass mineral simulant
Rose Quartz
Silicon dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Milky quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Chert (Flint / Quartz Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Weathered iron-rich rock, possibly limonite-bearing quartzite or altered basalt
Indeterminate; likely quartz (SiO₂) with iron oxides/hydroxides such as limonite/goethite
mineral
Chert (Jasper variation)
Chert (Silicate mineral, SiO2)
sedimentary
Feldspar (Orthoclase/Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic glass (SiO2-rich amorphous silicate)
igneous
Pumice
Pumice (a highly vesicular amorphous silicate glass)
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Precious Coral (Red Coral)
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Blue Topaz
Al2SiO4(F,OH)2
mineral
Green Jasper
Jasper (Silicates, SiO2)
sedimentary
Sandstone
Arenite (mostly SiO2)
sedimentary