Ferruginous Sandstone (Ironstone)
Arenite with Limonite/Goethite cement
sedimentary
Category
Not A Natural Rock
Browse not a natural rock specimens identified by the Rock Identifier community.
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Amber
Organic gemstone (Succinite)
mineral
Amber
Succinite (fossilized resin); C10H16O
mineraloid
Banded Agate (specifically Sardonyx or Carnelian Agate)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Quartz (Variety: Rose Quartz/Smoky Quartz mix)
Silicon Dioxide (SiO2)
mineral
Banded Agate (Botswana Agate)
Silicon Dioxide (SiO2)
mineral
Green Quartz (including Prase or Aventurine variants)
Silicon Dioxide (SiO2) with inclusions (likely Actinolite or Chlorite)
mineral
Granite
Granite (Mainly Quartz, Feldspar, and Mica)
igneous
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Diamond
Native Carbon (C)
mineral
Iron-Stained Quartz Pebble
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Serpentinite (often called Jade or Nephrite substitute)
Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)
metamorphic
Charoite
(K,Sr,Ba,Ca)15-16(Na,Ca)8(Si,Al)24O60(OH,F)4 · nH2O (Hydrated silicate of potassium, calcium, and sodium)
metamorphic
Heat-Treated Amethyst (Commercial Citrine)
Silicon Dioxide (SiO2) - Macro-crystalline Quartz
mineral
Shell Cameo
Cypraecassis rufa (Bullmouth Queen Helmet Shell)
mineraloid / biogenic specimen
Fluorite-Gedrite in Quartz (Schist)
Fluorite (CaF2) with Gedrite in Quartz/Feldspar Matrix
metamorphic
Green Aventurine
Quartz (Silicon Dioxide) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Water and Silt (Sedimentary Environment)
Suspended Sediment / H2O (dihydrogen monoxide)
sedimentary
Green Aventurine
Silicon Dioxide (Quartz) with inclusions of Fuchsite mica; Chemical formula: SiO2 + K(Al,Cr)2AlSi3O10(OH)2
metamorphic
Pink Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin (CaCO3)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Banded Calcite or Travertine
Calcium Carbonate (CaCO3)
Sedimentary
Chrysoberyl (Cyclic Twin)
Beryllium Aluminum Oxide (BeAl2O4)
mineral
Moonstone
Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8
mineral
Carnelian (a variety of Chalcedony)
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
![Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral](https://media.rockidentification.com/bd94961c-533a-4ed4-b8e1-773f9b478c18-thumbnail.jpg)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
mineral
Pearl
Calcium Carbonate (Aragonite and Calcite), CaCO3
mineral
Turquoise (Blue Howlite imitation)
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Strawberry Quartz (or Hematoid Quartz)
Silicon Dioxide (SiO2) with inclusions of Hematite or Goethite
mineral
Diamond (or Lab-Grown Cubic Zirconia)
Carbon (C)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Chert (Flint variety)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Carnelian Agate
Silicon dioxide (SiO2) - variety of chalcedony
mineral
Fluorite (Green Fluorite)
Fluorite (Calcium Fluoride, CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Black Obsidian
Volcanic Glass (predominantly SiO2, Silicon Dioxide)
igneous
Schist
Schist (metamorphic rock)
metamorphic
Agate Geode
Silicon Dioxide (SiO2)
mineral
Amber
Succinite (C10H16O)
Mineraloid
K2 Jasper (K2 Granite)
Azurite in Granite (Al2Cu3(CO3)2(OH)2 in NaAlSi3O8)
igneous
Amber
Succinite (formula varies, primarily C10H16O)
Mineraloid (Organic)