Aura Quartz / Rainbow Aura Quartz
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Category
Man Made Byproduct (Often Mistaken For Obsidian Or Emerald)
Browse man made byproduct (often mistaken for obsidian or emerald) specimens identified by the Rock Identifier community.
Learn about Man Made Byproduct (Often Mistaken For Obsidian Or Emerald) in the encyclopedia
View all →
Sandstone (Banded)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Golden Sheen Obsidian
Obsidian (volcanic glass) with inclusions of gas bubbles and mineral crystals (e.g., hematite, magnetite) causing the sheen
igneous
Vesicular Basalt
Extrusive Mafic Igneous Rock (Vesicular Basalt)
igneous
Blue Apatite
Calcium Phosphate (Ca5(PO4)3(F,Cl,OH))
mineral
Sandstone (specifically an Iron-Concretion)
Arenite with Iron Oxide (Limonite/Goethite) cementation
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Banded Calcite or Travertine
Calcium Carbonate (CaCO3)
Sedimentary
Pegmatite (likely Granitic Pegmatite)
Pegmatite (a coarse-grained igneous rock, often with granitic composition)
igneous
Ironstone Concretion / Goethite Nodules
Ironstone (composed primarily of Goethite FeO(OH) and Limonite)
sedimentary
Metallic iron meteorite fragments (probable)
Iron meteorite, chiefly kamacite (α-(Fe,Ni)) with possible taenite
meteorite
Banded Chert
Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)
Sedimentary
Chert (Flint)
Chert (predominantly SiO₂ - silicon dioxide)
sedimentary
Quartzite
Quartzite (primarily composed of SiO O₂)
Sedimentary Rock
Ironstone Concretion
Ironstone (primarily Siderite or Limonite)
sedimentary
Sandstone Concretion
Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)
sedimentary
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
sedimentary
Limonite (Iron Ore)
Hydrous Iron Oxide (goethite, lepidocrocite)
Mineral
Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Quartzite
Quartzite (SiO2 silicon dioxide)
metamorphic
Green Fluorite
Calcium Fluoride (CaF2)
mineral
BROWN GRANITE (likely 'Tan Brown' or similar)
Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)
igneous
Granite
Granite (a plutonic rock)
Igneous
Tumbled sodalite with white calcite veining
Sodalite, Na8(Al6Si6O24)Cl2, commonly intergrown with calcite, CaCO3
mineral
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Jade (likely Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Mineral
Emerald
Beryl (Be₃Al₂(SiO₃)‑₆) with Chromium/Vanadium impurities
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Chalcanthite
Hydrated copper(II) sulfate (CuSO4·5H2O)
mineral
Copper slag or vesicular basalt with copper minerals
Industrial slag / Basaltic matrix with secondary copper minerals
igneous
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Nephrite Jade
Nephrite
Mineral/Rock
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Obsidian
Volcanic glass
igneous
Granodiorite
Granodiorite
Igneous
Granite
Granite (a common rock name, not a single mineral species, composed primarily of quartz, feldspar, and mica/amphibole)
igneous
Banded Slag Glass (Leland Blue/Frankfort Green style)
Anthropogenic Glass Specimen (Amorphous Silicon Dioxide with impurities)
mineral
Obsidian
Obsidian (Volcanic Glass)
igneous
Obsidian
Volcanic Glass (SiO2)
igneous
N/A - Non-Geological Item
not a rock/mineral
Granite
Granite (Felsic Plutonic Rock)
igneous