Morganite
Beryl (Be3Al2Si6O18 with Mn)
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.
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Likely metallic meteorite fragment
Undetermined; possibly an iron meteorite or stony-iron meteorite
meteorite
Diamond
Carbon (C)
mineral
Dendritic Jasper (River Stone)
Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions
sedimentary
Dendritic Opal
Opalized Chalcedony with Manganese Inclusions (SiO2 · nH2O)
mineral
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2 + Fe4+ impurities)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Silver (Native Element)
Ag (Argentum)
mineral
Malachite
Malachite, Cu₂CO₃(OH)₂; a banded botryoidal copper carbonate specimen
mineral
Quartzite
Metamorphic Quartz Arenite
metamorphic
Iron meteorite fragment (likely metallic meteorite)
Fe–Ni kamacite/taenite alloy; exact identification requires testing
meteorite
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Nephrite Jade (or Serpentine)
Nephrite (a variety of amphibole mineral tremolite-actinolite) or Serpentine Group minerals
Mineral/Rock
Dendritic Agate (Tree Agate)
Chalcedony (Silicon Dioxide, SiO2) with Manganese or Iron Oxide inclusions
mineral
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Desert Varnish / Hematite-Goethite Nodule)
Iron oxide / hydroxide deposit (predominantly Fe2O3 and FeO(OH))
sedimentary
Serpentinite
Serpentinite; predominantly serpentine-group minerals, commonly with magnetite, talc, and carbonate
metamorphic
Emerald
Beryl (Be3Al2(SiO3)6)
gemstone
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Obsidian
Obsidian (Volcanic glass, primarily SiO2)
igneous
Polished black stone pendant
Likely black obsidian or black tourmaline; exact identification is uncertain from the photograph
mineral
Pearl necklace
Pearl, primarily aragonite (CaCO₃) and conchiolin
gemstone
Ironstone Concretion / Goethite-Hematite Nodule
Goethite/Hematite (α-FeO(OH) / Fe2O3)
sedimentary
Dendritic Agate (River Pebble)
Silicon Dioxide (SiO2) with Manganese or Iron oxide inclusions
mineral
Iron-stained Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Obsidian
Volcanic Glass (SiO2)
igneous
Ironstone Concretion
Siderite or Hematite Concretion (FeCO3 or Fe2O3)
sedimentary
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Quartzite
Meta-quartzite (SiO2)
metamorphic
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
gemstone
Obsidian
Amorphous volcanic glass (SiO2)
igneous
Ambergris
Ambra grisea (Metabolic byproduct)
Organic (Geological relative)
Obsidian
Obsidian (Volcanic Glass)
igneous
Emerald
Beryl (Be3Al2(SiO3)6)
gemstone
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
mineral
Obsidian
Obsidian (Volcanic Glass, SiO2 > 70%)
igneous
Sandstone
Arenite (SiO2 primarily)
sedimentary
Chalk
Calcium Carbonate (CaCO3)
sedimentary