Basalt
Basalt
igneous
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
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Basalt (River Stone)
Basalt
igneous
Basalt
Basaltic Mafic Rock
igneous
River Cobble (likely Basalt or Mafic Igneous Rock)
Extrusive Mafic Igneous Rock (e.g., Basalt)
igneous
Diorite
Phaneritic intermediate plutonic rock
igneous
Basalt Pebble
Basalt (Mafic volcanic rock)
igneous
Andesite
Andesite (contains Plagioclase feldspar, Pyroxene, Hornblende)
igneous
Chert (Iron-stained)
Chert (Cryptocrystalline Silica, SiO2)
sedimentary
Basalt River Pebble
Aphanitic Mafic Igneous Rock
igneous
Limestone
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Ferruginous Sandstone (with Pyrite/Gold associations)
Ferruginous Arenite (SiO2 + Fe2O3)
sedimentary
Basalt
Mafic Igneous Rock
igneous
Basalt (Beach Pebble)
Extrusive mafic igneous rock
igneous
Siltstone
Siltstone (primarily SiO2 with Al2O3)
sedimentary
Crushed Granite Gravel
Granite (Mainly Quartz, Feldspar, and Mica)
igneous
Basalt
Basalt (containing plagioclase feldspar, pyroxene, and olivine)
igneous
Basalt
Basalt (dominated by Plagioclase and Pyroxene)
igneous
Coquina
Biogenic Limestone (mostly Calcium Carbonate, CaCO3)
sedimentary
Basalt
Extrusive mafic igneous rock
igneous
Basalt
Aphanitic Mafic Igneous Rock
igneous
Diorite
Diorite
igneous
Goldfish Cracker (Culinary Mimic)
Cibus aurum (Commonly composed of Enriched Wheat Flour and Cheddar Cheese)
Anthropogenic Sedimentary-style Organic Solid
Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Tree Agate
Silicon Dioxide (SiO2) with Chlorite inclusions
sedimentary
Quartz-veined Siltstone
Siltstone with Quartz (SiO2) veins
sedimentary
Basalt
Basalt (containing mainly Plagioclase feldspar and Pyroxene)
igneous
Fossilized Rugose Coral
Order Rugosa (Calcium Carbonate - CaCO3)
sedimentary
Muscovite on Quartz (Mica host rock)
KAl2(AlSi3O10)(OH)2 (Muscovite) in SiO2 (Quartz)
igneous/metamorphic
Noble Serpentine
Antigorite (Mg3Si2O5(OH)4)
metamorphic
Que Sera Stone (Llanite)
Rhyolite Porphyry with Blue Quartz and Feldspar
igneous
Mica Schist
Muscovite Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Biotite Schist
Biotite-rich Schist
metamorphic
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Leopard Skin Jasper
Rhyolite (Silicon Dioxide with impurities), SiO2
igneous
Breccia
Breccia (Clastic sedimentary rock)
sedimentary
Dalmatian Stone (Dalmatian Jasper)
Dalmatian Stone (A variety of Perthite / Aplite)
Igneous
Diorite
Diorite (intermediate intrusive igneous rock)
igneous
Diorite
Diorite (Plagioclase feldspar and Hornblende/Biotite)
igneous
Gabbro
Plutonic mafic rock
igneous
Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)
Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)
Metamorphic
Yooperlite (Syenite clasts with Sodalite)
Fluorescent Sodalite-bearing Syenite
igneous
Jade
There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.
Mineral