Sunstone
Plagioclase Feldspar (Na, Ca)(Al, Si)4O8 with Hematite or Copper inclusions
mineral
Category
Mineral Like Byproduct (Technogenic)
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
Banded Agate (variety of Chalcedony)
Agate (SiO2)
mineral
Agate
Silicon Dioxide (SiO2)
mineral
Blue Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)
Mineral
Nuummite
Nuummite (ortho-amphibole rock)
metamorphic
Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Man-made object (Simulant)
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4 in Vesicular Basalt
igneous
Fluorite
Calcium fluoride (CaF2)
mineral
Septarian Nodule (Septarian Stone)
Septarian Concretion (CaCO3 with Siderite/Calcite/Aragonite)
sedimentary
Chalcedony (Pink/Gray variety)
Silicon Dioxide (SiO2)
mineral
Apatite
Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))
mineral
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Garnet (Almandine or Spessartine likely)
Garnet Group Minerals (e.g., Almandine Fe3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3)
Mineral
Amethyst (Chevron or Banded variety)
Silicon Dioxide with Iron impurities (SiO2)
mineral
Apricot Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Garnet
Garnet Group (formula varies, e.g., Almasndine: Fe3Al2(SiO4)3)
mineral
Sapphire
Corundum (Al2O3)
mineral
Smoky Quartz (with possible Garnet inclusions)
Silicon Dioxide (SiO2)
mineral
Breciated Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
Mineral
Milky Quartz (Water-Worn Pebble)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Feldspar (Orthoclase/Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
White Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
mineral
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Dendritic Agate (Tumbled)
Silicon Dioxide (SiO2) with inclusions
mineral
Botryoidal Chalcedony (Desert Rose / Grape Agate variant)
Silicon Dioxide (SiO2)
mineral
Iron Meteorite
Siderite (Iron-Nickel Alloy), predominantly Kamacite and Taenite (Fe, Ni)
mineral
Orca Agate
Chalcedony (Microcrystalline Quartz, SiO2)
mineral
Blue Lace Agate
Chalcedony (cryptocrystalline variety of Quartz), SiO2
mineral
Dendritic Siltstone (or Mudstone)
Siltstone with Manganese Oxide dendrites
sedimentary
Serpentinite
Serpentinite (complex silicate minerals including Lizardite, Antigorite, and Chrysotile)
metamorphic
Sandstone (likely Arkose or Quartz Sandstone)
Arenite (SiO2 + varied clasts)
sedimentary
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Limonite (with Goethite/Ironstone)
FeO(OH)·nH2O (Hydrated Iron Oxide)
mineral
Diamond (or high-quality simulant like Cubic Zirconia)
Carbon (C) - Native Element
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Glauconitic Sandstone
Glauconitic Sandstone (complex silicate formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Amethyst
Amethyst (Silicon Dioxide containing trace Iron impurities, SiO2)
mineral