Vesicular basalt (likely iron-rich volcanic rock)
Basalt; predominantly plagioclase feldspar, pyroxene, and commonly olivine, with iron oxides
igneous
Category
Mineral_rock
Browse mineral_rock specimens identified by the Rock Identifier community.
Learn about Mineral_rock in the encyclopedia
View all →
Lapis Lazuli
Lazurite-rich metamorphic rock (approx. (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Tiger's Eye (Raw)
Silicon Dioxide (SiO2) with fibrous crocidolite inclusions
metamorphic
Basalt with Vesicular Amygdule
Extrusive igneous rock (Mafic)
igneous
Weathered jasper/chert nodule
Microcrystalline quartz (SiO₂), likely iron- and clay-stained jasper or chert
sedimentary
Polished orbicular jasper / brecciated jasper bead bracelet
Jasper, microcrystalline quartz (SiO₂), with variable iron oxides and other silicate inclusions
mineral
Fossil bone fragment
Fossilized vertebrate bone, likely mammalian; exact taxon cannot be determined from the image
fossil
Granite
Granite (Felsic Plutonic Rock)
igneous
Sandstone with Quartz/Calcite druse
Arenite with druse (SiO2 or CaCO3)
sedimentary
Biotite gneiss (probable)
Foliated quartz–feldspar–mica gneiss; commonly containing biotite mica, quartz, and plagioclase/alkali feldspar
metamorphic
Diorite (Porphyritic) / Granite
Plutonic Igneous Rock (Granodiorite / Diorite)
igneous
Serpentine Sphere
Serpentinite
metamorphic
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Limonite (Iron Ore)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
mineral
Bauxite
Bauxite (Al2O3·2H2O mixed with iron oxides)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Snowflake Obsidian
Obsidian with Cristobalite inclusions (SiO2)
igneous
Granite Cobble
Granite
igneous
Granite
Granite (compositionally: Quartz, Alkali Feldspar, and Plagioclase)
igneous
Schist
Schist
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
mineral
Malachite
Copper carbonate hydroxide, Cu2CO3(OH)2
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Moss Agate
Chalcedony (Silicon Dioxide) with Chlorite or Iron/Manganese inclusions (SiO2)
mineral
Red Sandstone (Iron-rich)
Ferruginous Sandstone (SiO2 with Iron Oxides)
sedimentary
Snowflake Obsidian
Obsidian with Cristobalite inclusions
igneous
Epidote-bearing basalt
Basalt with epidote-group mineral inclusions, likely epidote or pistachite (Ca₂(Al,Fe³⁺)₃(SiO₄)₃(OH))
igneous
Quartz (Yellow/Tan Quartzite Pebble)
Silicon Dioxide (SiO2)
metamorphic
Weathered granite-like rock
Granite, likely biotite-bearing; exact identification is uncertain from the image
igneous
Copper Ore
Mixed copper sulfides/oxides in gangue matrix
mineral
Granite (likely weathered granite or granitic gneiss)
Granite; chiefly quartz (SiO₂), feldspar, and mica
igneous
Granite (Thin Section)
Granite (Felsic Plutonic Rock)
igneous
Weathered granite or granitic gneiss
Quartz–feldspar–mica granitic rock; possible biotite gneiss
igneous
Gneiss
Gneiss
metamorphic
Mica Schist
Schist (primarily Muscovite and Biotite mica)
metamorphic
Azurite Malachite
Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)
mineral
Polished leopard-skin jasper (orbicular jasper)
Silicified microcrystalline quartz/chalcedony, commonly with iron-oxide and manganese-oxide inclusions
metamorphic
Milky quartz fragment
Quartz, silicon dioxide (SiO₂)
mineral
Polished granite countertop with fossil shell
Granite; shell likely a fossilized bivalve or gastropod
igneous