Chert (Smooth River Siltstone/Basalt variant)
Silicon dioxide (SiO2) / Microcrystalline Quartz
sedimentary
Category
Organic Gem Material (Botanical)
Browse organic gem material (botanical) specimens identified by the Rock Identifier community.
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Chert (varietal: Flint/Jasper mix)
Hydrous Silica (SiO2)
sedimentary
Green Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Tan/Yellow variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (with small quartz vug)
Chert (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony or Quartz, SiO2)
mineral/sedimentary
Chert (Yellow Jasper/Agatized Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (White Chert / Flint)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Amber (Tumbled/Polished)
Succinite (Fossilized Tree Resin)
mineraloid
Amber
Succinite (approximate formula C10H16O)
mineraloid
Sandstone Chert Concretion
Silica-cemented Concretion (primarily SiO2)
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Precious Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
Mineral (Organic Gemstone)
Amber with inclusion
Amber (Fossilized Tree Resin)
mineral
Amber
Succinite (specifically Baltic Amber) - Formula: C10H16O (approximate)
Organic Mineraloid
Chert / Flint (with Crinoid Stem Molds)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (C10H16O)
mineraloid
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
organic mineraloid
Amber
Succinite (Resinous fossilized tree sap)
Mineraloid
Ferruginous Sandstone Concretion (Ironstone Phosphorite)
Ferruginous Sandstone (variable Fe-oxide/hydroxide composition)
sedimentary
Chert (Arrowhead)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz (with potential inclusion)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
River Stone (Greywacke)
Greywacke (immature sandstone)
sedimentary
Amethyst (Pale/Lavender variety)
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst Quartz
Amethyst (SiO2 with Iron impurities)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron traces)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Kyanite
Kyanite (Al2SiO5)
Mineral
Limestone (Cliff Formation)
Limestone (predominantly CaCO3 as calcite)
Sedimentary
Limonite (Ironstone)
Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))
mineral
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Limonite (Iron Ore)
Limonite (Hydrous iron(III) oxide-hydroxide mixture, primarily FeO(OH)·nH2O)
mineral
Jasper (Nephrite-like appearance)
Silicon Dioxide (SiO2) with impurities
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Mineral
Cubic Zirconia
Cubic Zirconium Dioxide (ZrO2)
mineral
Chalcedony on Matrix
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Chondrite Meteorite
Ordinary Chondrite (S-type Asteroid fragment)
mineral