Quartz Geode
Crystalline Silicon Dioxide (SiO2) in sedimentary/volcanic host
mineral
Category
Mineral Like Byproduct (Technogenic)
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
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Greenschist
Greenschist (composed mainly of chlorite, epidote, actinolite, and albite)
metamorphic
Moss Agate
Silicon dioxide (SiO2)
gemstone
Aventurine Quartz
Silicon dioxide with fuchsite inclusions (SiO2)
mineral
Red Quartz
Silicon Dioxide (SiO2)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Granitic Pegmatite
Granite (with coarse-grained Quartz, Feldspar, and Mica components)
igneous
Desert Rose
Gypsum variety selenite (CaSO4 · 2H2O)
mineral
Yellow Aventurine
Silica (SiO2) with inclusions
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Tumbled amethyst (likely)
Quartz, SiO₂; purple variety known as amethyst
gemstone
Orange Sapphire
Corundum (Al2O3 with trace elements)
gemstone
Picture Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Carved Stone Turtle
Carved Soapstone and Quartz
mineral
Petrified Wood Agate
Silicified Wood (primarily SiO2)
fossil
Bauxite
Bauxite (mixture of hydrous aluminum oxides: Al(OH)3 & AlO(OH))
sedimentary
Red Garnet (Pyrope or Almandine)
Garnet Group (A3B2(SiO4)3)
mineral
Greenstone
Metamorphic mafic rock (greenschist facies)
metamorphic
Granite
Intrusive igneous rock composed mainly of quartz, alkali feldspar, and plagioclase
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Peacock Ore
Bornite (Cu5FeS4)
mineral
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
mineral
Quartz-veined Granite or Gneiss Pebble
Silicate-rich metamorphic rock fragment
metamorphic
Kidney Stone (Calcium Oxalate / Uric Acid)
Calcium Oxalate Monohydrate (Whewellite) / Calcium Oxalate Dihydrate (Weddellite)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pegmatite
Igneous Pegmatite
igneous
Limonite Concretion
Hydrated Iron Oxide-Hydroxide, FeO(OH)·nH2O
mineral
Chalcedony (Yellow/Brown Agate Pebble)
Silicon Dioxide (SiO2)
mineral
Greenstone Pebble
Metabasalt / Greenstone
metamorphic
Limonite / Ironstone
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
mineral
Desert Rose
Gypsum rosette (CaSO4·2H2O)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide mixture)
mineral
Plume Agate or Moss Agate
Silicon dioxide (SiO2)
Mineral
Porphyritic Igneous Rock with Iron Oxide Weathering
Weathered Porphyry (containing Quartz, Feldspar, Amphibole/Biotite, and Hematite/Limonite)
igneous
Mica Schist
Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Tree Agate
Chalcedony (SiO2)
gemstone
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Prehnite with Epidote inclusions
Prehnite - Ca2Al(AlSi3O10)(OH)2; Epidote - Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH)
mineral
Orthoclase Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Greenstone
Metabasalt / Metavolcanic rock
metamorphic