Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Category
Man Made
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Blue Celestite
Strontium Sulfate (SrSO4)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Lazulite
Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2
mineral
Pumice and Scoria
Vesicular Volcanic Rock (Pumice: Silicic / Scoria: Mafic)
igneous
Multi-Gemstone Quartz Bracelet (Amethyst, Aventurine, Rose Quartz, Clear Quartz)
Silicon Dioxide (SiO2) mixture
gemstone
Quartz Grain
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Pink Granite
Granite (Phaneritic Igneous Rock)
igneous
Limestone
CaCO3 (Mainly Calcite or Aragonite)
sedimentary
Dyed Agate
Chalcedony (SiO2)
Mineral
Biotite (Black Mica)
K(Mg,Fe)3AlSi3O10(OH,F)2
mineral
Sea Glass
Silica (SiO2) - Amorphous
Mineral
Cubic Zirconia (Simulated Diamond)
Zirconium dioxide (ZrO2)
mineral
Vesicular Basalt (or Scoria)
Basalt (Aphanitic-Vesicular Mafic Igneous Rock)
igneous
Granite
Plutonic Granite
igneous
Granite
Felsic Intrusive Igneous Rock
igneous
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sedimentary
Basalt
Basalt
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Siltstone or Mudstone
Argillaceous sedimentary rock
sedimentary
Quartzite
Quartzite (Mainly SiO2)
metamorphic
Granite
Granite (dominated by Quartz, Alkali Feldspar, and Plagioclase)
igneous
Limestone (Micrite/Chalky variety)
Calcium Carbonate (CaCO3)
sedimentary
Clear Quartz Cluster
Quartz (Silicon Dioxide, SiO2)
mineral
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Schist
Mica Schist (Metamorphic Rock)
metamorphic
Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2)
sedimentary
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Pumice
Pumice (Highly vesicular volcanic rock)
igneous
Vesicular Basalt (Iron-rich)
Scoriaceous Basalt / Oxidized Vesicular Basalt
igneous
Ruby
Corundum (Al2O3 with Chromium trace impurities)
mineral
Jasper
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt
Extrusive mafic igneous rock
igneous
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary