Milky quartz (rough fragment)
Quartz, silicon dioxide (SiO₂)
Category
Browse mineral like industrial smelting waste specimens identified by the Rock Identifier community.
Milky quartz (rough fragment)
Quartz, silicon dioxide (SiO₂)
Diamond (or Cubic Zirconia simulant)
Carbon (C) / Zirconium Dioxide (ZrO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Yellow Calcite (Banded)
Calcium Carbonate (CaCO3)
Rough Corundum (Sapphire/Ruby mixture)
Corundum (Aluminum Oxide, Al2O3)
Bauxite
Bauxite (mixture of Hydrous Aluminum Oxides)
Schist
Mica Schist (Metamorphic Rock)
Chalcedony (Common Opal or Agate variant)
Silicon Dioxide (SiO₂)
Diamond
Diamond (Pure Carbon, C)
Diamond
C (Carbon)
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
Laterite (Iron-rich bauxite or Gossan)
Ferricrete (Fe2O3·nH2O)
Quartz (Field Stone)
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Agate
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Arfvedsonite (often mistakenly sold as Astrophyllite)
Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2]
White Topaz
Topaz - Al2SiO4(F,OH)2
Sandstone
Arenite
Stilbite
Stilbite-Ca (NaCa4Mg[Al9Si27O72]·28H2O)
Quartz (Druzy on Matrix)
Silicon Dioxide (SiO2)
Green sea glass (likely slag glass or bottle glass)
Man-made soda-lime silicate glass; not a naturally occurring mineral
Pegmatite
Granitic Pegmatite
Uncertain small pale mineral fragment
Indeterminate; possibly calcite or a light-colored feldspar fragment
Bauxite
Bauxite (Al(OH)3 mixed with Fe2O3 and clay minerals)
Native Copper in Basalt
Cuprum (with Host Basalt)
Blue Sapphire
Corundum (Al2O3 with trace Titanium and Iron)
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Bauxite
Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)
Milky Quartz Pebble
Silicon Dioxide (SiO2)
Asphalt (Road Aggregate)
Bituminous Conglomerate / Asphalt Concrete
Green Calcite
Calcium Carbonate (CaCO3)
Ironstone Concretion
Siderite or Hematite-bonded Concretion
Kimberlite with Diamond
Kimberlite (Diamond formula: C)
Howlite
Howlite, Ca₂B₅SiO₉(OH)₅
Silver Flakes in Glass
Silver (Ag)
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
Quartz with Mica (Granitic / Pegmatitic Quartz)
Silicon Dioxide (SiO2) with Mica group minerals
Rough Diamond
Diamond (pure carbon / C)
Quartz pebble
Silicon dioxide (SiO2)
Gneiss (specifically Micaceous Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)