Amazonite
Microcline (KAlSi3O8) with trace lead
mineral
Category
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Botryoidal Chalcedony
Cryptocrystalline Silicon Dioxide (SiO2)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Moss Agate
Cryptocrystalline Quartz (SiO2 with Manganese or Iron Oxide inclusions)
mineral
Amazonite
Microcline (KAlSi3O8) with trace lead
mineral
Opal
Hydrated Silica (SiO2·nH2O)
mineral
Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Banded Agate (Botswana Agate)
Silicon Dioxide (SiO2)
mineral
Dragon Blood Jasper
Epidote-rich Quartzite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Ruby (in jewelry)
Corundum (Al2O3 with Chromium traces)
mineral
Black Agate (Banded)
Silicon Dioxide (SiO2)
Mineral
Adventurine (Green Quartz)
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Soapstone mushroom decorative carving
Steatite (Hydrous magnesium silicate, Mg3Si4O10(OH)2)
metamorphic
Ferruginous Sandstone (ironstone)
Sandstone with iron oxide cement (limonite/hematite)
sedimentary
Jasper (Iron-rich)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities
sedimentary
Brachiopod Fossil in Limestone
Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)
sedimentary
New Jade (Serpentine)
Antigorite / Serpentine Group (Mg3Si2O5(OH)4)
metamorphic
Porphyritic Andesite (often called Chinese Writing Stone)
Porphyritic Basaltic Andesite with Feldspar Phenocrysts
igneous
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Serpentine
Antigorite, Lizardite, or Chrysotile; (Mg, Fe)3Si2O5(OH)4
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2 (Magnesium-rich Tremolite-Actinolite)
metamorphic
Serpentine
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Quartzite
Quartzite (SiO2 silicon dioxide)
metamorphic
Pink Granite
Phaneritic Plutonic Felsic Rock (K-Feldspar Granite)
igneous
Biological Specimen (Domestic Dog)
Canis lupus familiaris
Organic (Non-rock)
Granite
Phaneritic Plutonic Rock (Granite)
igneous
Kambaba Jasper
Stromatolite Jasper (Microcrystalline Quartz)
sedimentary
Red Jasper
Jasper (SiO2) with Hematite (Fe2O3) inclusions
sedimentary (microcrystalline quartz)
Pink Marble (Quartzite or Calcite mix)
Metamorphosed Limestone / Quartzite (CaCO3 or SiO2 with iron impurities)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
Mineral
Fossiliferous Limestone
Fossiliferous Calclutite / Bio-calcarenite (CaCO3)
sedimentary
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Blue Lace Agate (Polished Point)
Silicon Dioxide (SiO2)
mineral