Malachite
Copper carbonate hydroxide, Cu2CO3(OH)2
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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Amber
Succinite (with formula approximately C10H16O)
Organic mineraloid
Seashell (Cone Snail Shell)
Conus sp. (Calcium Carbonate, CaCO3)
fossil
Amazonite
Amazonite (K(AlSi3O8))
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Jasper
Microcrystalline quartz (SiO2)
sedimentary
Banded Jasper
Silicate Mineral (Microcrystalline Quartz / SiO2)
sedimentary
Chert / Flint
Chert (SiO2)
sedimentary
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Rhodonite in Quartz Matrix
Rhodonite (Manganese Iron Magnesium Calcium Silicate - Mn,Fe,Mg,Ca)SiO3
mineral
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
Poppy Jasper
Silicon Dioxide (SiO2) with Hematite and Iron Oxide inclusions
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
metamorphic
Fossilized Bone
Petrified Bone / Biogenic Sedimentary
fossil
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite in Shale
Iron Disulfide (FeS2)
mineral
Jasper / Agate (Chalcedony)
Silicon dioxide (SiO2)
sedimentary
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
gemstone
Carnelian (Orange Chalcedony)
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Limestone or Sandstone Cobble
Sedimentary rock (Calcium carbonate or Quartz based)
sedimentary
Granite Pegmatite
Pegmatite (Fulgite / Felsic Intrusive Rock)
igneous
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with Limonite inclusions)
metamorphic
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Sulfur on Aragonite
Sulfur (S) on Aragonite (CaCO3)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper and Agate (Polychrome Jasper / Mookaite variety)
Silicon dioxide (SiO2) microcrystalline quartz
sedimentary
Tumbled Agate Pebble
Silicon Dioxide (SiO2)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Jasper with Iron Inclusions
Silicon Dioxide (SiO2) with Hematite/Goethite
sedimentary
Yellow Chalcedony (common opal or chert variant)
Silicon Dioxide (SiO2)
sedimentary (mineraloid/microcrystalline quartz)
Native Gold
Native Gold (Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Optical Calcite (Iceland Spar)
Calcium Carbonate (CaCO3)
mineral
Chert (Basanite / Jasperoid)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary