![Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral](https://media.rockidentification.com/92ebc6b5-08ac-4229-a727-57a096ec7f2c-thumbnail.jpg)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
mineral
Category
Anthropogenic (Man Made)
Browse anthropogenic (man made) specimens identified by the Rock Identifier community.
Pearl (Biogenic Mineraloid)
Calcium carbonate (Aragonite) and Conchiolin, CaCO3
mineral
Rough Diamond
Diamond (Pure Carbon: C)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Sedimentary
Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)
Calcite
Mineral
Green Banded Chert (Agate/Jasper)
Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite
sedimentary
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Mineral
Native Silver
Silver (Ag)
mineral
Mother of Pearl (Nacre)
Calcium Carbonate (primarily aragonite, with conchiolin)
Organic Gemstone/Biomineral
Mixed Gemstone Beaded Jewelry
Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)
Mineral
Obsidian
Obsidian (volcanic glass, amorphous silica rich rock)
Igneous
Seraphinite
Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.
Mineral
Chert
Silicon dioxide (SiO2)
Sedimentary
Ferruginous Sandstone
Sandstone, Iron-rich
sedimentary
Marble
Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.
Metamorphic Rock
Rose Quartz Carving
Quartum roseum (Variety of Quartz, SiO2)
Mineral
Rose Quartz (likely carved)
Rose Quartz (SiO2)
Mineral
Granite
Granite
Igneous
Serpentinite
Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)
Metamorphic Rock
Stainless Steel Spoon
Iron-Chromium Alloy (Fe + Cr + Ni)
mineral-based human-made alloy
Quartz
Quartz (SiO₂)
Mineral
Porphyritic Basalt or Diabase with Plagioclase Phenocrysts
Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar
Igneous
Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)
N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)
Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)
Turquoise
Turquoise (Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O)
Mineral
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Quartz
Quartz (SiO₂)
Mineral
Chert (often called Flint)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Flint
Chert (a form of cryptocrystalline quartz, chemical formula SiO₂)
Mineral
Banded Iron Formation
Banded Iron Formation (BIF)
Metamorphic Rock
Granite
Plutonic felsic igneous rock
igneous
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Granite
Granite (Phaneritic Igneous Rock)
igneous
Granite Pebble
Igneous Intrusive Rock (Quartz-Feldspar-Mica Phenocrysts)
igneous
Olivine in Basalt matrix
Peridotite (Mg, Fe)2SiO4
igneous
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
sedimentary
![Lapis Lazuli (A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).) — Mineral](https://media.rockidentification.com/760dd0e4-f05b-4f64-aeb8-2b011a61a1b4-thumbnail.jpg)
Lapis Lazuli
A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).
Mineral
Granite
Felsic Plutonic Rock (primarily SiO2)
igneous
Granite
Phaneritic plutonic rock (Quartz + Feldspar + Mica)
igneous
Calcite
Calcite (CaCO3)
Mineral