Sunstone
Oligoclase (Plagioclase Feldspar) / (Ca,Na)(Al,Si)4O8
mineral
Category
Anthropic Metallic Specimen
Browse anthropic metallic specimen specimens identified by the Rock Identifier community.
Basalt Water-Worn Pebble
Aphanitic Mafic Igneous Rock
igneous
Iron-rich concretion or slag-like mineral fragment
Likely limonite/goethite (FeO(OH)·nH₂O), possibly magnetite-bearing material
mineral
Mica Schist
Mica Schist
metamorphic
Tumbled sodalite (probable)
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue-dyed jasper or lapis lazuli
mineral
Basalt (with possible weathering or secondary mineral crust)
Basalt (Aphanitic Mafic Igneous Rock)
Igneous
Gold (in Opaque Matrix/Jewelry)
Native Gold (Au)
mineral
Basalt pebble
Basalt
igneous
Diabase (Greenstone)
Diabase or Dolerite
igneous
Silver (Jewelry Specimen)
Native Silver (Chemical Formula: Ag)
mineral
Possible iron meteorite
Iron meteorite, likely an iron–nickel alloy (kamacite/taenite)
meteorite
Pyrite
Iron disulfide (FeS2)
mineral
Quartz-bearing metamorphic rock, likely garnet-mica schist
Quartz–mica schist with probable garnet and iron-oxide minerals
metamorphic
Black Tourmaline in Quartz Matrix
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) with Quartz (SiO2)
mineral
Opalite
Synthetic Opalised Glass
mineraloid (synthetic)
Sunstone
Aventurine Feldspar (composition: (Ca,Na)((Al,Si)2Si2O8))
mineral
Black Tourmaline (Schorl) in Matrix
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
mineral
Basalt Pebble
Extrusive Mafic Igneous Rock
igneous
Pyrite
Iron Disulfide (FeS2)
mineral
Native copper-bearing rock
Native copper (Cu), likely with copper oxides/carbonates in a host rock
mineral
Fluorite
Calcium fluoride (CaF2)
mineral
Basalt (Vesicular/Scoriaceous)
Extrusive Mafic Volcanic Rock (Primarily Plagioclase Feldspar and Pyroxene)
Igneous
Basalt with Iron Oxidation
Mafic Igneous Basalt
igneous
Vesicular Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Purpurite
Manganese Iron Phosphate, Mn3+(PO4)
mineral
Basalt Pebble
Basalt
igneous
Basalt Pebble
Basalt (Mafic volcanic rock)
igneous
Mica Schist with Quartz
Mica-Quartz Schist (Muscovite subclass)
metamorphic
Iron Slag
Iron Slag (Industrial Vitreous Material)
Mineral/By-product
Quartzite Cobble
Quartzite (mostly SiO2)
metamorphic
Sunstone
Plagioclase Feldspar (Na,Ca)(Si,Al)4O8
mineral
Sunstone
Orthoclase or Oligoclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Weathered quartz-bearing rock, possibly iron-stained quartzite or granitic pegmatite
Indeterminate; likely quartz-rich silicate rock with iron-oxide staining (SiO₂-dominant)
igneous
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Iron-rich sandstone or ferruginous quartzite
Hematite/goethite-bearing quartz sandstone; possibly weakly metamorphosed to quartzite
sedimentary
Green fluorite (likely polished/cut specimen)
Fluorite, calcium fluoride (CaF₂)
mineral
Basalt River Pebble
Basalt (Mafic Volcanic Rock)
igneous
Basalt (River Pebble)
Basalt
igneous
Basalt
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Faceted Glass (Costume Jewelry)
Amorphous Silicon Dioxide with colorants (Glass)
Synthetic/Man-made Material
Basalt Pebble
Basalt (Mafic Volcanic Rock)
igneous
Pyrite
Iron Sulfide (FeS2)
mineral