Quartz with Iron Oxide Inclusions
SiO2 with Fe2O3 impurities
Mineral
Category
Synthetic Or Natural Fiber
Browse synthetic or natural fiber specimens identified by the Rock Identifier community.
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Turquoise and Hematite
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Lemon (Mock specimen mimicking Citrine/Sulfur)
Citrus x limon
Organic (Biological specimen)
Yellow Jade (Nephrite or Jadeite)
Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 or Jadeite: NaAlSi2O6
metamorphic
Red Aventurine
Aventurine Quartz (SiO2 + Hematite/Goethite)
metamorphic
Ruby Zoisite
Anyolite (Zoisite with Ruby and Pargasite)
metamorphic
Sandstone (Quartz Arenite)
Sandstone (dominated by SiO2 quartz grains)
sedimentary
Chondrite Meteorite
Ordinary Chondrite (OC)
igneous
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Orthoclase Feldspar (or K-Feldspar)
Orthoclase (KAlSi3O8)
Mineral
Orthoclase Feldspar (Salmon variety)
Orthoclase, KAlSi3O8
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Orbicular Granite
Orbicular Granitoid
igneous
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Orthoceras Fossil in Limestone
Orthoceras regulare
sedimentary
Opal
Hydrated Silica (SiO2·nH2O)
mineral
Dream Amethyst (Chevron Amethyst)
Silicon Dioxide (SiO2) with Ferric Iron impurities
mineral
Basalt
Extrusive Mafic Igneous Rock
igneous
Quartzite Pebbler
Quartzite (mainly SiO2)
metamorphic
Basalt
Basalt (Mafic Extrusive Rock)
igneous
Pink Quartz / Rose Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Mafic Igneous Basalt
igneous
Iolite (Cordierite)
Cordierite (Magnesium Aluminum Silicate), Mg2Al4Si5O18
mineral
Fossilized Solitary Rugose Coral
Order Rugosa (commonly Horn Coral)
sedimentary
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt
Extrusive mafic volcanic rock
igneous
White Quartz (Mushroom Carving)
Quartz (Silicon Dioxide - SiO2)
mineral
Pearl
Calcium carbonate (CaCO3) in the form of Aragonite or Calcite
mineral
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite
mineral
Goethite
Goethite (FeO(OH))
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese or Iron
mineral
Rhodonite
Manganese silicate (MnSiO3)
mineral
Chrysocolla
Chrysocolla; (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Mineral description (Anthropogenic material)
Basalt
Extrusive mafic igneous rock
igneous
Banded Agate
Silicon Dioxide (SiO2)
mineral