Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)
metamorphic
Category
Mineral (Biogenic)
Browse mineral (biogenic) specimens identified by the Rock Identifier community.
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Jasper (specifically Red Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Herkimer Diamond
Quartz (SiO2)
mineral
Rose Quartz
SiO2 (Silicon Dioxide with trace Titanium, Iron, or Manganese)
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
mineral
Quartz / Clear Quartz
Silicon Dioxide (SiO2)
mineral
Labradorite
Labradorite (Plagioclase Feldspar Series: (Ca,Na)(Al,Si)4O8)
mineral
Yellow Quartz or Citrine
Silicon Dioxide (SiO2)
mineral
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities and white quartz bands
mineral
Amethyst (Chevron Amethyst)
Amethystine Quartz (SiO2)
mineral
Amethyst or Smoky Quartz Geode Slice
Crystalline Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Amethyst (Quartz)
Amethyst (SiO2 with iron impurities)
mineral
Calcite in Matrix
Calcium Carbonate (CaCO3) on Sedimentary Host Rock
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Schorl (Black Tourmaline) in Quartz/Feldspar Matrix
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
mineral
Poppy Jasper
Silicon Dioxide (SiO2) with Hematite and Iron Oxide inclusions
sedimentary
Nuummite
Nuummite (mixture of Anthophyllite and Gedrite)
metamorphic
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2 with Iron impurities)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with impurities of iron)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2) with iron impurities
Mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions (Hematite/Goethite)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Gold Nugget
Native Gold (Au)
mineral
Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Blue Lace Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Bumblebee Jasper
Fossiliferous Volcanic Rock (composed of Calcium Carbonate, Manganese Oxides, and Arsenic Sulfides)
igneous
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
mineral
Quartz Druzy Geode Fragment
Silicon Dioxide (SiO2)
mineral
Septarian Nodule (Dragon Stone)
Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)
sedimentary
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral
Dendritic Jasper
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
sedimentary
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Limonite after Pyrite (Pseudomorph)
FeO(OH)·nH2O following FeS2
mineral