Mixed Crushed Stone
Aggregate (varied mineral composition)
igneous and sedimentary mixture
Category
Mixed
Browse mixed specimens identified by the Rock Identifier community.
Quartz and Mixed Gravel
Silicon Dioxide (SiO2) with minor impurities
Mineral
Mixed Gemstone Bracelet
Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)
Mineral/Rock assemblage
Slag
Ferrous slag (by-product of iron smelting)
Mineraloid / Anthropogenic
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
sedimentary (artificial)
Tumbled Carnelian and Quartz Mix
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Granite (Pink/Potassium Feldspar Granite)
Felsic Plutonic Rock (Potassium Feldspar, Quartz, Mica, and Amphibole)
igneous
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
mineral
Epidotite (Unakite variety)
Epidotized Granite (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Mixed Quartz and River Pebbles (Stone Collection)
Mixed assortment containing mainly Silicon Dioxide (SiO2)
igneous, sedimentary, metamorphic, and mineral
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite inclusions (SiO2 + Fe2O3)
Igneous
Peacock Ore
Bornite (Cu5FeS4)
mineral
Pink Granite
Phaneritic Plutonic Felsic Rock (K-feldspar rich)
igneous
River Rocks and Pebbles
Mixed Silica-rich Sediments (SiO2 based)
sedimentary
Bauxite
Bauxite (Al2O3·2H2O mixed with iron oxides)
sedimentary
Greywacke (River Pebble)
Greywacke sandstone with quartz veining
sedimentary
Mixed Quartz and Jasper Pebbles
Silicon Dioxide (SiO2)
Mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Educational Geologic Collection
Mixed Mineral and Rock Collection (Various compositions)
mineral
Limonite (Ironstone Concretion)
Limonite (Hydrous Ferric Oxides mixed with Goethite)
sedimentary
Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles
Mixed gemstones (primarily Silicon Dioxide - SiO2)
mineral
Dalmatian Stone (commonly called Dalmatian Jasper)
Peralkaline Rock (mixed Feldspar, Quartz, and Arfvedsonite)
igneous
River Siltstone / Mudstone Pebble
Siltstone (composed of mixed silicate and carbonate minerals)
sedimentary
Pink Granite
Phaneritic intrusive igneous rock with dominant Alkali Feldspar
igneous
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
mineral
Epidosite
Epidosite (Metasomatic rock consisting mainly of Epidote and Quartz)
metamorphic
Granodiorite
Granodiorite (phaneritic intrusive igneous rock)
igneous
Pink Granite (Crystalline Granite)
Igneous Intrusive Rock (Felsic Plutonic)
igneous
Epidosite (Epidote-rich rock)
Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))
metamorphic
Red Jasper (in Quartz/Chalcedony)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Granite Cobble
Phaneritic Plutonic Felsic Rock
igneous
Fuchsite in Quartz
K(Al,Cr)2(AlSi3O10)(OH)2 in SiO2
Metamorphic Rock / Mineral Association
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Banded Iron Formation (BIF) / Iron Ore
Hematite-Magnetite BIF (Fe2O3 / Fe3O4 mixed with SiO2)
sedimentary
Pearl
Calcium Carbonate (Aragonite/Calcite mixed with Conchiolin), CaCO3
mineral
Mixed Tumbled Stones Collection
Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)
multiple
Schist (Micaceous Schist)
Micaceous schist (Mainly Muscovite/Biotite mixed with Quartz)
metamorphic
Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)
Mixed Silicates and Oxides (predominantly SiO2 group minerals)
mineral
Mohave Turquoise (Composite/Stabilized)
Hydrated copper aluminium phosphate (CuAl6(PO4)4(OH)8·4H2O) with stabilizing resin and metallic inclusions
mineral
Pink Granite
Phaneritic Plutonic Felsic Igneous Rock (Granite)
igneous