Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Category
Mineral Like Byproduct (Technogenic)
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
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Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2)
Mineral
Copper Ore (Malachite, Azurite, and Chalcopyrite in Host Rock)
Copper-bearing polymetallic mineral aggregate (Cu-minerals)
mineral
Quartz Geode
Crystalline Silicon Dioxide (SiO2) within a geode structure
mineral
Banded Gneiss
Gneiss (Metamorphic rock)
metamorphic
Sandstone
Sandstone (SiO2 dominated)
sedimentary
Green Quartz (Prasiolite/Adventurine/Jasper)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite / Apatite group (Ca5(PO4)3(F,Cl,OH))
mineral
Fossilized Shark Tooth
Elasmobranchii (fossilized matrix/root section)
fossil
Greenschist (Chlorite Schist)
Greenschist (containing Chlorite, Actinolite, and Epidote)
metamorphic
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Copper Ore (with Malachite and Azurite)
Hydroxide copper carbonate (Cu2CO3(OH)2 / Cu3(CO3)2(OH)2)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Muscovite (Mica)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Black Tourmaline
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide)
mineral
Garnet (specifically Almandine or Pyrope)
Almandine: Fe3Al2(SiO4)3 or Pyrope: Mg3Al2(SiO4)3
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Blue Sapphire
Corundum (Al2O3 with trace Titanium and Iron)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Amethyst (Raw Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Limonite / Ironstone Nodule
Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O
mineral
Greenstone
Metabasalt / Greenschist facies rock
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Amygdaloidal Basalt with Epidote/Chlorite
Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))
igneous
Diorite
Diorite
igneous
Howlite
Hydrous calcium borosilicate (Ca2B5SiO9(OH)5)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Schist
Schist
metamorphic
Malachite and Azurite on Gossan (Ironstone Matrix)
Cu2CO3(OH)2 (Malachite) on FeO(OH)·nH2O (Limonite/Gossan)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Lepidolite in Quartz (Lithium-bearing Ore)
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) and Quartz (SiO2)
igneous/mineral
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Dalmation Jasper (or Dalmation Stone)
Dalmation Stone (composed of Perthite, Quartz, and Arfvedsonite)
igneous
Montana Moss Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Obsidian
Obsidian (Volcanic Glass, primarily SiO2)
igneous
Jasper Mushroom Carving
Silicon Dioxide (Microcrystalline Quartz, SiO2)
mineral
Limonite (Iron Ore)
Limonite (̑FeO(OH)·nH₂O)
sedimentary
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral