![Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — Mineral](https://media.rockidentification.com/2fc8ee47-9aaf-4e01-9b51-63927847540c-thumbnail.jpg)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Mineral
Category
Organic Gemstone (Often Associated With Sedimentary Sequences)
Browse organic gemstone (often associated with sedimentary sequences) specimens identified by the Rock Identifier community.
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Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Chert (Flint)
Cryptocrystalline quartz (SiO2)
sedimentary
Rhodonite
Manganese Silicate (MnSiO₃)
mineral
Chert / Flint
Cryptocrystalline Quartz (SiO2)
sedimentary
Red Jasper (River-worn Pebble)
Silicon Dioxide (SiO2) with Ferric Iron inclusions
sedimentary (microcrystalline silicate)
Jasper
Silicon dioxide (SiO2)
sedimentary
Celestite
Celestine (SrSO4)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Anthracite coal (likely)
Anthracite; carbon-rich coal composed mainly of maceral vitrinite, with variable mineral impurities
sedimentary
Amber
Succinite (a fossilized organic resin)
mineral
Chert (with Limestone matrix)
Chert (Silica: SiO2)
sedimentary
Weathered chert or siliceous iron-rich rock
Microcrystalline quartz (SiO₂), possibly ferruginous chert/jasper
sedimentary
Chert (specifically Flint or Jasper variant)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Yellow/Brown Jasper)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)
sedimentary
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
sedimentary
Chert (Agatized/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Pink Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Jasper transition)
Microcrystalline Quartz (SiO2)
sedimentary
Basaltic Tuff / Volcanic Breccia
Pyroclastic Breccia / Lithic Tuff
igneous
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint Nodular)
Chert (Silicon dioxide, SiO2)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Yellow Jasper (Mookaite style)
Silicon Dioxide (SiO2) with Goethite/Hematite inclusions
sedimentary
Polished ocean jasper (orbicular jasper)
Microcrystalline quartz (SiO₂) with chalcedony, iron oxides, and assorted silicate inclusions
mineral
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Banded chert or siliceous sedimentary rock
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide staining and possible carbonate/clay layers
sedimentary
Jasper with Epidote
Silicon Dioxide (SiO2) with Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
sedimentary
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Bamboo Leaf Jasper
Silicified Siltstone or Jasper (SiO2)
sedimentary
Herkimer Diamond
Quartz (Silica - SiO2)
mineral
Chert (often referred to as Flint or Jasper)
Chalcedony (SiO2) - Silicon Dioxide
sedimentary
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Limestone (specifically Bituminous or Carbonaceous Limestone)
Calcium Carbonate (CaCO3) with Organic Impurities
sedimentary
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Chert (often called Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral