Peridotite
Ultramafic igneous rock (primarily olivine and pyroxene)
igneous
Category
Sedimentary Or Igneous Associated Mineral
Browse sedimentary or igneous associated mineral specimens identified by the Rock Identifier community.
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Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Jasper and Chalcedony Nodule
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Banded Chert
Silicon Dioxide (SiO2) with impurities
sedimentary
Granite
Intrusive Igneous Rock
igneous
Greenstone / Epidosite
Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)
metamorphic
Fluorite
Calcium Fluoride (CaF2)
Mineral
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Basaltic Tuff / Volcanic Breccia
Pyroclastic Breccia / Lithic Tuff
igneous
Green Calcite
Calcite (CaCO3)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Leopard Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Fluorite on Matrix
Calcium Fluoride (CaF2)
mineral
Snowflake obsidian cabochon
Obsidian (volcanic glass), SiO₂-rich; white areas are cristobalite/spherulitic devitrification
igneous
Diorite (or Gabbro/Granitoid)
Diorite
igneous
Pink Chalcedony
Silicon Dioxide (SiO2)
mineral
Tree Agate
Silicon Dioxide (SiO2) with dendritic inclusions
mineral
Red Jasper
SiO2 (Silicon Dioxide with Hematite inclusions)
mineral
Pink Granite
Phaneritic intrusive igneous rock (high Orthoclase Feldspar content)
igneous
Gneiss (specifically a Banded Gneiss pebble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Amygdaloidal Basalt
Basalt with secondary mineral infillings (SiO2, (Ca,Na)2-3(Mg,Fe,Al)5Si8O22(OH)2)
igneous
Gold Ore in Quartz
Auriferous Quartz (Au + SiO2)
igneous
Dragon Blood Jasper
Epidote-rich Quartzite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Greenish Feldspathic Rock / Epidote Granite (Unakite-type or Epidote-bearing rock)
Epidotized Metamorphic/Igneous Rock
metamorphic
Rose Quartz
Rose Quartz (SiO2 with trace Ti, Fe, or Mn)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Sodalite Syenite
Sodalite-bearing Syenite (Na8(Al6Si6O24)Cl2)
igneous
Honey Calcite Sphere
Calcium Carbonate (CaCO3)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineralological
Jasper with Agate Inclusions
Jasper (Silicon Dioxide, SiO2) with Chalcedony/Agate
sedimentary
Diorite
Diorite (Intermediate Plutonic Rock)
igneous
Tumbled milky quartz pebble
Quartz (SiO₂), likely milky quartz
mineral
Muscovite Mica (likely on Quartz/Feldspar)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Greenschist / Greenstone
Greenschist facies metabasite
metamorphic
Chalcedony (Agate / Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Black Sapphire (Basaltic Blue Sapphire)
Corundum (Al2O3)
mineral
Polished black stone, likely black obsidian
Obsidian (volcanic glass), primarily silica-rich rhyolitic composition
igneous
Dendritic Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral