Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
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Tiger's Eye
Tiger's eye (Pseudomorph of Quartz after Crocidolite), SiO2
metamorphic
Sandstone
Arenite (SiO2 secondary)
sedimentary
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Gold in Quartz Ore
Hydrothermal Quartz with native Gold (Au)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert with Iron Oxide Staining
Microcrystalline Quartz (SiO2) with Limonite/Goethite staining
sedimentary
Granite
Intrusive Igneous Rock (Felsic)
igneous
Granite
Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)
igneous
Milky Quartz or Calcite Pebble
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
mineral
Serpentine
Serpentinite (rock) containing serpentine minerals (e.g., Antigorite, Lizardite, Chrysotile)
Metamorphic rock
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Graphite
Graphite (Carbon, C)
mineral
Assorted Beach Rocks and Pebbles
Various (Granite, Basalt, Quartz, Conglomerate, etc.)
igneous, sedimentary, metamorphic
Red Sandstone
Sandstone (lithic arenite or arkose with iron oxide)
sedimentary
Septarian Nodule (Dragon Stone)
Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxides)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
mineral
Banded Onyx (Mexican Onyx / Travertine)
Calcite (CaCO3) - Banded Travertine
sedimentary
Coprolite
Fossilized Feces
sedimentary
Olivine in Basalt (Peridotite Xenolith)
Forsterite-rich Olivine (Mg2SiO4) in Aphanitic Basalt
igneous
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Mixed Crushed Stone
Aggregate (varied mineral composition)
igneous and sedimentary mixture
Quartz with Iron Oxide Inclusions
Silicon Dioxide (SiO2) with Iron Hydroxide/Oxide (Limonite/Goethite)
mineral
Mixed Rock Collection (Pebbles and Stones)
Various geological specimens
igneous, sedimentary, and metamorphic
Quartz (Granular)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Fibrous Quartz (SiO2) with iron inclusions
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Ferruginous Sandstone
Sandstone (enriched with Iron Oxide)
sedimentary
Fossilized Shark Tooth
Scapanorhynchus (Sand Tiger Shark relative)
sedimentary
Graphite
Graphite (Carbon, C)
mineral
Feldspar
Triclinic or Monoclinic Tectosilicate (e.g., KAlSi3O8)
mineral
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Blue Slag Glass
Amorphous Silica (Industrial byproduct)
Antropogenic (Man-made glass byproduct)
Diamond
Diamond (pure Carbon, C)
mineral
Basalt with Amygdules
Amygdaloidal Basalt
igneous
Copper Ore Specimen
Cupriferous Rock / Malachite-bearing ore
mineral
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Fossil Shell
Invertebrate fossil (Mollusca)
fossil
Fossilized Shark Tooth
Lamniformes (order) fossil
fossil
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral