Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Category
Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite)
Browse metamorphic rock (for nephrite and some jadeite); mineral (for jadeite) specimens identified by the Rock Identifier community.
Granitic Pegmatite
Granite Pegmatite (typically containing Quartz SiO2, Feldspar KAlSi3O8, and Muscovite)
Igneous
Sandstone (Ferruginous)
Arenite (with iron oxide cement)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pumice
Pumice (Vesicular volcanic glass)
igneous
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Diabase (Dolerite) Cobble
Diabase / Dolerite
igneous
Red Jasper (Banded Jasper)
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Peridot
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral
Red Slag Glass
Amorphous Silica (Industrial byproduct with metallic oxide dopants)
Mineraloid / Industrial Byproduct
Amygdaloidal Basalt
Amygdaloidal Basalt (extrusive volcanic rock)
Igneous
River Cobble (likely Basalt or Rhyolite)
Extrusive Igneous Rock (Mafic or Intermediate)
igneous
Sunstone
Oligoclase (a plagioclase feldspar variant), (Na,Ca)(Al,Si)4O8
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Red Scoria (Lava Rock)
Scoria (Vesicular Basalt/Andesite)
igneous
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
mineral
Ironstone Concretion (Iron-rich Mudstone)
Siderite / Geothite concretion (FeCO3 / FeO(OH))
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Fe2O3 staining)
sedimentary
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Limonite/Goethite)
Ferruginous Sandstone / Ironstone (FeO(OH)·nH2O)
sedimentary
Quartzite
Quartzite (SiO2)
Metamorphic
Granite (including Pegmatite variants)
Phaneritic Plutonic Rock (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Muscovite mica)
Igneous
Milky Quartz
Silicon dioxide (SiO2)
mineral
Wishing Stone (Quartz-veined Siltstone or Graywacke)
Hydrothermal Quartz vein in matrix of SiO2 (Quartz) and Al2O3 (Clay minerals)
sedimentary
Agate (specifically a Blue Agate Geode Slice)
Chalcedony (cryptocrystalline variety of Quartz); SiO2
mineral
Quartzite River Cobble
Quartzite (primarily SiO2)
metamorphic
Ironstone Concretion (Limonite/Goethite)
Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)
sedimentary
Diorite (River Rock)
Intermediate plutonic igneous rock
igneous
Sandy Ironstone
Ferruginous Sandstone
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Quartz (White/Milky with Iron Staining)
Silicon Dioxide (SiO2)
mineral
Chert (Chert / Flint nodule)
Silicon Dioxide (SiO2)
sedimentary
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Ferruginous Sandstone (Ironstone Nodules)
Ferruginous Sandstone with Limonite/Goethite coating (Fe2O3·H2O)
sedimentary
Ocean Jasper
Silicon Dioxide (SiO2) with various inclusions
Mineral (Variety of Quartz)
Granodiorite or Diorite
Granodiorite / Diorite
igneous
Black Obsidian
Obsidian (Volcanic Glass)
igneous
Chert (varietal Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Ferruginous Sandstone
Ferruginous Clastic Sedimentary Rock
sedimentary
Bronzite
Enstatite (var. Bronzite), (Mg,Fe)SiO3
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral