Polished amber
Amber (fossilized plant resin), commonly succinite; organic mineraloid rather than a true mineral
gemstone
Category
Organic Gemstone (Mineraloid)
Browse organic gemstone (mineraloid) specimens identified by the Rock Identifier community.
Learn about Organic Gemstone (Mineraloid) in the encyclopedia
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Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Pearl
Calcium carbonate (CaCO3) - mainly Aragonite with Conchiolin
mineraloid
Baltic Amber
Succinite (Polmerized conifer resin)
mineraloid
Obsidian
Obsidian (Amorphous volcanic glass, predominantly SiO2)
igneous
Precious Coral
Corallium rubrum (Calcium carbonate with trace carotene)
Organic gemstone / Sedimentary mineraloid
Precious Opal
Hydrated Silica (SiO2·nH2O)
mineral
Amber
Succinite (specifically for Baltic amber); C10H16O (Variable organic compound)
mineral
Amber
Succinite (fossilized tree resin)
Organic Mineraloid
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
igneous
Opal
Hydrated Silica (SiO2·nH2O)
mineral
Tektite (Indochinite)
Tektite (High-silica natural glass)
mineraloid
Precious Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Amber
Succinite (Formula: C10H16O)
Organic Mineraloid
Black Obsidian
Volcanic Glass (SiO2 + impurities like Fe3O4)
igneous
Pink Opal
Hydrated Silica (SiO2·nH2O) with Palygorskite inclusions
Mineraloid
Amber
Succinate (Succinite for Baltic varieties)
Organic Mineraloid
Black Opal (Kalimaya)
Hydrated Silica (SiO2·nH2O)
mineraloid
Pearl
Aragonite / Calcium Carbonate (CaCO3)
mineraloid
Boulder Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Amber
Succinite (approximate formula C10H16O)
mineraloid
Precious Opal
Hydrated silica (SiO2·nH2O)
mineraloid
Amber
Succinite (fossilized tree resin)
Organic Mineraloid
Orange cabochon gemstone, likely amber or amber-like resin
Natural amber: fossilized plant resin (organic mineraloid), commonly succinite; exact identification requires testing
gemstone
Black Opal
Hydrated silica (SiO2·nH2O)
mineraloid
Opal
Hydrated silica (SiO2 · nH2O)
mineraloid
Tektite (Indochinite)
Tektite (High-silica impact glass)
mineraloid
Obsidian
Volcanic glass
igneous
Amber (specifically Burmese Amber or Burmite)
Succiniferous fossil resin (C10H16O)
mineraloid
Precious Opal
Hydrated Silica (SiO2·nH2O)
mineral
Obsidian
Obsidian (volcanic glass), primarily SiO2 (silicon dioxide)
igneous
Amber
Succinite (specifically for Baltic amber); Complex mixture of organic compounds (C10H16O)
Organic Mineraloid
Shungite
Carbonaceous rock (primarily amorphous carbon)
Mineraloid
Black Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
igneous
Precious Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Opalite
Man-made opalescent glass
gemstone
Opal
Hydrated Silica (SiO2·nH2O)
mineral
Fire Opal (in matrix)
Hydrated Silica (SiO2·nH2O)
Mineraloid
Pearls (likely freshwater cultured pearls)
Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin
gemstone
Fire Opal (in Matrix)
Hydrated Silica (SiO2·nH2O)
mineral
Amber
Succinite (specifically Baltic Amber) - Formula: C10H16O (approximate)
Organic Mineraloid
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
organic mineraloid