Agate
Banded Chalcedony (SiO2 - Silicon Dioxide)
Category
Browse mineral like industrial smelting waste specimens identified by the Rock Identifier community.
Agate
Banded Chalcedony (SiO2 - Silicon Dioxide)
Quartz Pebble
Silicon Dioxide (SiO2)
Milky Quartz / Quartz Geode Fragment
Silicon Dioxide (SiO2)
Sandstone (Quartz Arenite)
Clastic Sedimentary Rock - Quartz Arenite
Kyawthuite
Kyawthuite (Bi3+Sb5+O4)
Garnet
Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
Sandstone
Sandstone (clastic sedimentary rock), primarily SiO2
Graphic Granite
Graphic Granite (a variety of Pegmatite)
Garnet Schist
Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)
Green Quartz (Prasiolite)
Crystalline Silicon Dioxide (SiO2)
Black Sapphire
Corundum (Al2O3)
Garnet
Silicate mineral group (often Pyrope or Almandine in this color range)
Opalite Egg
Synthetic Glass (Simulated Opal)
Olivine (Peridot)
Olivine (Magnesium Iron Silicate, (Mg,Fe)2SiO4)
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
Granitic Pegmatite
Granitic Pegmatite (principally Quartz, Feldspar, and Mica)
Ruby (Raw Corundum)
Corundum (Al2O3 with Chromium impurities)
Muscovite Mica (in Quartz matrix)
Potassium aluminum silicate hydroxide fluoride (KAl2(AlSi3O10)(F,OH)2)
Greenish Metamorphic Rock (likely containing epidote or chlorite)
Metamorphic rock, possibly epidosite or greenstone
Garnet
Nesosilicate group (e.g., Almandine: Fe3Al2(SiO4)3)
Blue Apatite
Fluorapatite / Apatite Group (Ca5(PO4)3(F,Cl,OH))
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Milky Quartz (Gold-bearing Prospecting Specimen)
Silicon Dioxide (SiO2)
Silicon
Element Si
Diamond (or Diamond Simulant)
Carbon (C)
Garnet (likely Almandine)
Almandine - Fe3Al2(SiO4)3
Tumbled Quartz Pebble
Silicon Dioxide (SiO2)
Mica Schist
Mica Schist
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Hematite/Limonite inclusions
Greywacke (River Pebble)
Greywacke sandstone with quartz veining
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
Rough Gemstone Grains (Mixed Sapphires and Quartz)
Corundum (Al2O3) and Quartz (SiO2)
White Quartz (Carved Heart)
Silicon Dioxide (SiO2)
Red Sandstone
Arenite (with Iron Oxide)
Almandine Garnet (weathered)
Almandine (Fe3Al2(SiO4)3)
Garnet
Garnet Group (formula varies, e.g., Almasndine: Fe3Al2(SiO4)3)
Sandstone (Pebble)
Arenite (primarily SiO2)
Blue Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Olivine (Peridot when gem-quality)
Olivine Group (Magnesium Iron Silicate, (Mg,Fe)2SiO4)
Sapphire
Corundum (Al2O3)
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)
Sandstone with Iron Staining
Arenite (SiO2 with Fe-oxide impurities)