Green Quartz / Chrysoprase / Sea Glass
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Alluvial Deposit)
Browse sedimentary (alluvial deposit) specimens identified by the Rock Identifier community.
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Bort or Carbonado
C - Polycrystalline Diamond
mineral
Yellow Diamond
Diamond (Carbon, C)
mineral
Diamond
Natural Diamond (Carbon, C)
mineral
Ferruginous Quartz (River Pebble)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary (secondary classification for a weathered mineral specimen)
Corundum (Sapphire variant)
Aluminium oxide (Al2O3)
mineral
Burmese Jadeite (Water Jade)
Jadeite (NaAlSi2O6)
metamorphic
Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2)
mineral
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Gold Placer (Gold Flakes and Nuggets)
Native Gold (Au)
mineral
Garnet
Garnet group species (likely Almandine, Fe3Al2(SiO4)3)
mineral
Sapphire
Corundum (Al2O3)
mineral
Gold Nugget
Native Gold (Au)
mineral
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Quartz Pebble in Arkosic Sand
Silicon Dioxide (SiO2)
mineral
Ruby / Red Tourmaline
Corundum (Al2O3) or Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4)
mineral
Gold Nugget
Native Gold (Au)
mineral
Gold Flake / Placer Gold
Native Gold (Au)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with Fe2+ impurities)
mineral
Gold Nugget
Native Gold (Au)
mineral
Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary
Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
gemstone
Gold and Diamond Jewelry
Native Gold (Au) and Diamond (C)
gemstone
Rough White Zircon
Zircon (Zirconium Silicate, ZrSiO4)
mineral
Sapphire (Rough)
Corundum (Al2O3)
mineral
Sapphire
Corundum (Al2O3)
gemstone
Ruby (Corundum)
Aluminum oxide (Al2O3) with Chromium traces
mineral
Gold
Native Gold (Au)
mineral
Ruby (Corundum)
Aluminium oxide (Al2O3) with Chromium traces
mineral
Sapphire (Rough Corundum)
Corundum (Aluminum Oxide, Al2O3)
mineral
Gold (Placer Gold Nuggets)
Native Gold (Au)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Quartz-rich polymict conglomerate (possibly hydrothermal breccia)
Clast-supported polymict conglomerate dominated by quartz; includes chalcedony/quartz and dark lithic clasts
sedimentary
Rounded river cobble, likely quartz-rich sandstone or quartzite
Indeterminate; probable quartz arenite (sandstone) or low-grade quartzite, chiefly SiO₂
sedimentary / metamorphic
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Gemstone Sand (Mineral Assortment)
Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)
mineral
Rough Diamond
Diamond (Native Element Carbon, C)
mineral
Conglomerate
Clast-supported polymict conglomerate
sedimentary
Diamond (Faceted)
Carbon (C)
gemstone
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon Dioxide (SiO2)
mineral