Banded chert or siliceous mudstone
Microcrystalline quartz (chalcedony), SiO₂; possibly ferruginous shale
sedimentary
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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Turquoise (possible Dyed Magnesite/Howlite)
CuAl6(PO4)4(OH)8·4H2O
mineral
Red Jasper
Jasper (Silicon Dioxide) - SiO2
sedimentary/mineral
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Red Jasper (Polished Point Pendant)
Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
gemstone
Amber (Copal)
Fossilized Tree Resin
mineraloid
Jasper
Silicon dioxide (SiO2) with iron oxide impurities
sedimentary
Fancy Jasper
Jasper (Cryptocrystalline Quartz, SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper (Red Jasper)
Silicon Dioxide (SiO₂)
sedimentary
Jasper
Silicon Dioxide (SiO2)
sedimentary
Black Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Green Chert (Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Green Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Black Chert or Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (often called Jasper or Flint)
Microcrystalline Silica (SiO2)
sedimentary
Amazonite
Microcline (KAlSi3O8) with lead impurities
mineral
Chert (Jasper/Mudstone variety with Oxidation)
Silicon dioxide (SiO2)
sedimentary
Chert (Siliceous Mudstone variant)
Microcrystalline quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Chert (Smoky variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Black Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Amazonite
Microcline Feldspar (KAlSi3O8)
mineral
Malachite with Chrysocolla
Copper carbonate hydroxide (Cu2CO3(OH)2) and Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Chert / Flint
Silicon dioxide (SiO2)
sedimentary
Chert (with Quartz Druzy)
Microcrystalline Silica (SiO2)
sedimentary
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Carnelian Agate
Chalcedony (SiO2) with iron oxide inclusions
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary