Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Man Made
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Milky Quartz
Quartz (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Basalt River Pebble
Basalt
igneous
Galena
Lead(II) sulfide (PbS)
mineral
Basalt
Extrusive mafic igneous rock
igneous
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2 (Calcium magnesium iron silicate hydroxide)
metamorphic
Imperial Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Mineral Inclusions
Sedimentary
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2), a variety of Actinolite-Tremolite
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Amethyst
SiO2 (Silicon Dioxide)
mineral
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Chert (Flint)
Microcrystalline Quartz or Cryptocrystalline Silica (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert with Limestone matrix
Microcrystalline silica (SiO2) in Calcite (CaCO3) matrix
sedimentary
Quartz Pebble (Chalcedony/Agate)
Silicon Dioxide (SiO2)
Mineral
Quartz
Silicon dioxide (SiO2)
Mineral
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Apache Tear
Obsidian (Hydrated Silica / Amorphous Volcanic Glass)
igneous
Basalt (River Stone)
Vesicular Basalt
igneous
Basalt (River Stone)
Extrusive mafic igneous rock
igneous
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
igneous
Red Scoria
Vesicular Basaltic Andesite
igneous
Garnet
Garnet group species (likely Almandine, Fe3Al2(SiO4)3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Dalmatian Stone
Peralkaline rhyolite with arfvedsonite inclusions
igneous
Rough Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
mineral
Amethyst
Silicon dioxide (SiO2) with iron impurities
mineral
Greenstone / Greenstone Pebble
Greenschist (metamorphosed basalt or gabbro)
metamorphic
Jadeite Jade
Jadeite (NaAlSi2O6)
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite)
sedimentary
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH)
mineral
Tufa (Vesicular Limestone)
Tufa (form of Calcium Carbonate, CaCO3)
sedimentary