Gold Nugget
Native Gold (Au)
mineral
Category
Sedimentary (Alluvial Deposit)
Browse sedimentary (alluvial deposit) specimens identified by the Rock Identifier community.
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Conglomerate
Conglomerate
sedimentary
Chert (and Chalcedony/Agate mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Weathered polymictic conglomerate or breccia
Polymictic conglomerate/breccia, likely iron-stained and quartz-bearing
sedimentary
Gold and Silver (Metal Components of an Antique Pocket Watch)
Native Gold (Au) and Native Silver (Ag)
mineral
River Pebble (Greywacke or Chert mix)
Silicon Dioxide (SiO2) with varying mineral impurities
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Rounded dark volcanic pebble
Likely basalt or basaltic andesite
igneous
Agate Pebble (Desert Agate / Chalcedony Nodule)
Silicon Dioxide (SiO2)
mineral
Pebble
Clast (Lithic fragment / Quartzite pebble)
sedimentary
Amber
Succinite
Organic (Mineraloid)
Garnet (Almandine variety)
Almandine, Fe3Al2(SiO4)3
Mineral
Blue Topaz (Cut Gemstone)
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
gemstone
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Diamond
C (Carbon)
gemstone
Diamond
Native Carbon (C)
gemstone
Diamond
Carbon (C)
mineral
Yellow Diamond (Faceted)
Diamond (C - Pure Carbon)
mineral
Diamond (in a jewelry setting)
Carbon (C)
mineral
Diamond (in jewelry)
Diamond (Carbon, C)
mineral
Quartz (Water-worn pebble)
Silicon Dioxide (SiO2)
mineral
Diamond
Native Carbon (C)
gemstone
Diamond (Cut Gemstone)
Carbon (C)
gemstone
Diamond
Carbon (C)
gemstone
Diamond (Faceted)
Carbon (C)
gemstone
Diamond
C (Native Carbon)
mineral
Diamond
Carbon (C)
gemstone
Diamond
Carbon (C)
mineral
Quartz (Translucent/Rose variety)
Silicon Dioxide (SiO2)
mineral
Corundum (Pink Sapphire / Ruby)
Al2O3 (Aluminum Oxide)
mineral
Diamond (in jewelry mount)
Carbon (C)
mineral
Quartzite
Quartzite
metamorphic
Conglomerate
Conglomeratic Sandstone
sedimentary
Carnelian Bracelet
Carnelian (Cryptocrystalline Quartz, SiO2)
gemstone
Yellow Sapphire
Corundum (Al2O3)
gemstone
Yellow Sapphire
Corundum (Al2O3)
gemstone
Gold Nugget
Gold (Au)
mineral
Ruby (in a ring setting)
Corundum (Al2O3:Cr)
gemstone
Yellow Sapphire
Corundum (Al2O3)
gemstone
Kyawthuite
Kyawthuite (Bi3+Sb5+O4)
mineral
Raw Ruby (Corundum)
Corundum (Aluminum Oxide, Al2O3)
mineral
Chinese Jade (Green Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
gemstone