Amazonite
Potassium Feldspar (Microcline) - K(AlSi3O8)
mineral
Category
This Image Does Not Display A Rock, Mineral, Or Geological Specimen. It Shows A Human Hand Wearing A Ring.
Browse this image does not display a rock, mineral, or geological specimen. it shows a human hand wearing a ring. specimens identified by the Rock Identifier community.
Sandstone (Weathered Pebble)
Arenite (primarily SiO2)
sedimentary
Jasper (Red Jasper)
Silicon Dioxide (SiO₂)
sedimentary
Ferruginous Quartzite (also known as Ironstone or Gossan)
Ferruginous Quartzite with Goethite/Hematite staining
metamorphic
Basalt River Stone
Basalt (Mafic volcanic rock, primarily Plagioclase and Pyroxene)
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Andesite
Andesite (Intermediate Volcanic Rock)
igneous
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Greenstone
Greenschist / Greenstone (containing Chlorite, Epidote, Actinolite)
metamorphic
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Jasper or Agate-bearing Chert
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Orange Quartzite (Tumbled Beach Pebble)
Quartzite (primarily SiO2)
metamorphic
Pink Chalcedony (Agate/Jasper blend)
Silicon Dioxide (SiO₂)
mineral
Limonite (Yellow Ochre)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Iron Ore (Limonite and Hematite)
Goethite/Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)
mineral
Amethyst
Amethyst (variety of Quartz, SiO2)
mineral
Granitic Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Concrete Rubble with Aggregate
Hardened Portland Cement Paste with Coarse Aggregate
Anthropogenic (Man-made)
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
Crystalline Silicon Dioxide with Iron impurities (SiO2)
mineral
Gneiss
Gneiss
metamorphic
River Siltstone / Mudstone Pebble
Siltstone (composed of mixed silicate and carbonate minerals)
sedimentary
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Chert (Pink Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide inclusions (Fe2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS) with Quartz (SiO2)
Mineral in a Metamorphic/Hydrothermal rock
Granite
Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)
igneous
N/A (This is a digital image of a bar graph)
Digital Data Visualization (Bar Chart)
This is not a rock or mineral
White Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with inclusions of Hematite
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock
Limonite (Iron Ore Congcretion)
Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)
mineral
Orbicular Jasper (Ocean Jasper)
Silicon Dioxide (SiO2) with iron and magnesium inclusions
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Quartz (Silicon Dioxide) with Iron Inclusion (SiO2 + Fe2O3)
mineral
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral