Quartz
Silicon Dioxide (SiO2)
Category
Browse mineral, jewelry specimens identified by the Rock Identifier community.
Quartz
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Gold Ore (in Quartz/Pyrite)
Native Gold (Au) with Quartz (SiO2) and Pyrite (FeS2)
Garden Quartz
Included Quartz (SiO2 with accessory minerals such as Chlorite, Hematite, or Feldspar)
Fluorite (Rainbow/Purple Fluorite)
Calcium Fluoride (CaF2)
Blue Quartz (Blue Aventurine)
Silicon Dioxide with inclusions (SiO2)
Amber
Fossilized tree resin
Chrysocolla
(Cu,Al)2H2Si2O5(OH)4·nH2O
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
Rutilated Quartz (with Garnet pendant)
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
Diamond (or Cubic Zirconia simulant)
C (Carbon) or ZrO2 (Zirconium Dioxide)
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Green Aventurine
Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions
Lepidolite
Lepidolite [K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2]
Banded Gneiss
Gneiss (pronounced 'nice')
Quartz Geode
Silicon Dioxide (SiO2)
Quartz (likely heat-treated or colored cord)
Silicon Dioxide (SiO2)
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
Ruby Zoisite
Anyolite (Zoisite with Ruby and Pargasite)
Malachite
Copper carbonate hydroxide, Cu2CO3(OH)2
Turquoise (possible Dyed Magnesite/Howlite)
CuAl6(PO4)4(OH)8·4H2O
Porphyry (Flower Stone)
Porphyritic Basalt or Andesite
Weathered granitic rock fragment
Granite, predominantly quartz–feldspar–mica assemblage
Quartz (Grain)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Megalodon Shark Tooth
Otodus megalodon
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Apricot Agate
Silicon Dioxide (SiO2) - Chalcedony variety
Labradorite (Polished Sphere)
(Ca, Na)(Al, Si)4O8 (Silicate mineral)
Tumbled Stones (various)
Mixed Silica-based Minerals (primarily Quartz and Chalcedony)
Pearl
Calcium carbonate (CaCO3) + organic conchiolin (Biogenic Mineral)
Obsidian
Volcanic Glass (Amorphous SiO2)
Banded Chert
Silicon Dioxide (SiO2) with impurities
Pyrope Garnet (Bohemian Garnets)
Pyrope (from the group Mg3Al2(SiO4)3)
Banded Rhyolite (likely Green Jasper/Agate variety)
Silicon Dioxide (SiO2) with mineral inclusions
Milky quartz (rough quartz fragment)
Quartz, silicon dioxide (SiO₂)
Greenstone
Metabasalt (composed mainly of chlorite, epidote, and actinolite)
Zebra Jasper
Silicified sedimentary rock (SiO2) with mineral inclusions
Unakite
Altered Granite (Epidotized Granite)
Moonstone
Orthoclase feldspar ((K,Na)AlSi3O8) with inclusions of Albite
K2 stone (azurite–granite)
Biotite granite hosting blue azurite (Cu₃(CO₃)₂(OH)₂), often with malachite and quartz