Hematite (beads)
Hematite (Fe₂O₃)
Mineral
Category
Igneous, Sedimentary, Or Metamorphic (Mineral Based)
Browse igneous, sedimentary, or metamorphic (mineral based) specimens identified by the Rock Identifier community.
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Dalmatian Stone
Peralkaline Feldsphathic Igneous Rock
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock with secondary mineral fillings)
igneous
Dalmatian Jasper
Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)
igneous
Gneiss
Gneiss
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Blue Topaz (specifically London Blue shade)
Topaz - Al2SiO4(F,OH)2
mineral
Conglomerate
Conglomerate (SiO2 matrix with various silicate clasts)
sedimentary
Kyanite (Green and Blue varieties)
Kyanite (Al2SiO5)
mineral
Basalt
Basalt (composition of plagioclase, pyroxene, and olivine)
igneous
Sandstone (Iron-stained)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Gold Ore in Matrix
Native Gold (Au) in Quartz/Host Rock
mineral
Corundum (Sapphire variant)
Aluminium oxide (Al2O3)
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Banded Agate (Tumbled)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Gold Ore
Native Gold (Au) in Matrix
mineral
Iron-stained Quartz (with Limonite/Hematite)
Silicon Dioxide (SiO2) with Iron Oxide inclusions (FeO(OH) or Fe2O3)
Mineral
Granodiorite
Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)
igneous
Quartz (likely milky quartz or a stained variety)
Silicon Dioxide (SiO₂)
Mineral
Basalt with Quartz Vein and Weathering Crust
Amygdaloidal or Porphyritic Basalt
igneous
Granite
Granite
igneous
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Basalt (Crushed Stone Aggregate)
Mafic Volcanic Basalt (Major Minerals: Plagioclase Feldspar, Pyroxene, Olivine)
igneous
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Mineral
Snowflake Obsidian
Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)
igneous
Yellow Jasper
Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)
Mineral-based Sedimentary/Silica
Dendritic Agate (also known as Dendritic Siltstone or Mudstone)
Silicon Dioxide with Manganese/Iron Oxide inclusions (SiO2 + MnO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
White Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
mineral
Porphyritic Andesite
Andesite (Intermediate Extrusive Volcanic Rock)
igneous
Diorite
Diorite (plutonic igneous rock)
igneous
Granite
Phaneritic Plutonic Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Mica Schist
Mica Schist (predominantly composed of Muscovite or Biotite silicates)
metamorphic
Yellow Quartz (Citrine type/Tumbled Quartz)
Silicon Dioxide (SiO2)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Milky or Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Titanium Quartz (Rough)
Titanium-included Silicon Dioxide (SiO2 + Ti)
mineral