Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Category
Organic Gemstone (Often Associated With Sedimentary Sequences)
Browse organic gemstone (often associated with sedimentary sequences) specimens identified by the Rock Identifier community.
Learn about Organic Gemstone (Often Associated With Sedimentary Sequences) in the encyclopedia
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White Howlite
Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Flint
Chert (a form of cryptocrystalline quartz, chemical formula SiO₂)
Mineral
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Turquoise
CuAl6(PO4)4(OH)8·4H2O
gemstone
Fluorite
Calcium Fluoride (CaF2)
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)
sedimentary
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Amber (Copal)
Fossilized Tree Resin
mineraloid
Chert (specifically Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Jasper (Silicon Dioxide) - SiO2
sedimentary/mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2) with iron oxide impurities
sedimentary
Chert (Green variety)
Silicon Dioxide (SiO2)
sedimentary
Chert Nodule
Microcrystalline Silica (SiO2)
sedimentary
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Jasper (specifically Fancy or Polychrome Jasper)
Silicon Dioxide (SiO2) - Chalcedony
Sedimentary
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Alabaster
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
sedimentary
Conglomerate
Polymictic Conglomerate
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint/Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Weathered brown chert or silicified mudstone
Microcrystalline quartz (chalcedony), SiO₂; possibly a ferruginous silicified sediment
sedimentary
Chert (specifically Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinicum (Formula: C10H16O)
Mineraloid
Petrified Wood
Silicified wood (principally SiO2)
sedimentary
Dearest Jewelry (Multigemstone)
Combination of Diamond (C), Emerald (Be3Al2Si6O18), Amethyst/Rock Crystal (SiO2), Ruby (Al2O3), Emerald (Be3Al2Si6O18), Sapphire (Al2O3), and Topaz (Al2SiO4(F,OH)2)
Mineral
Jasper
Silicon dioxide (SiO2) with iron inclusions
sedimentary
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Pink Opal
Hydrated Silica (SiO2·nH2O) with Palygorskite/Sepiolite inclusions
gemstone
Chert (and its variety Flint)
Silicon dioxide (SiO2) / Microcrystalline quartz
sedimentary
Tumbled carnelian (orange chalcedony)
Carnelian, a microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Glauconitic Sandstone (or Greensand)
Glauconitic Siliciclastic Rock (Containing (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary