Black Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
igneous
Category
Sedimentary (Or Mineraloid)
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Limonite (Yellow Ochre)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Obsidian
Obsidian (Volcanic Glass)
igneous
Limonite (Ironstone)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Limonite (Iron Ore)
Limonite (Hydrated iron oxide - FeO(OH)·nH2O)
mineral
Amber
Succinite (Resinite)
mineraloid
Amber with Organic Inclusions
Succinite (fossilized resin)
mineraloid
Green Opal
Hydrated amorphous silica (SiO2·nH2O) with inclusions
mineraloid
Amber (Copal)
Succinate (Fossilized Resin)
mineraloid
Amber
Succinite (fossilized tree resin)
mineraloid
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Amber
Succinite (fossilized resin)
mineraloid
Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
mineraloid
Shungite
Carbonaceous rock (primarily amorphous carbon)
Mineraloid
Cullet Glass (Slag)
Amorphous Silicon Dioxide (Man-made)
Mineraloid
Tektite (Indochinite)
Impact Glass (SiO2 + Al2O3)
mineraloid
Slag (Industrial Glass)
Anthropogenic Amorphous Vitreous Silicate
mineraloid
Pearl
Calcium carbonate (CaCO3) - mainly Aragonite with Conchiolin
mineraloid
Amber
Amber (Succinite), fossilized tree resin
Mineraloid
Conch Pearl
Calcareous concretion (CaCO3)
mineraloid
Amber
Succinite (approximate formula C10H16O)
mineraloid
Tektite (Indochinite)
Tektite (SiO2 + Al2O3)
mineraloid
Sea Glass (Frosted Quartz/Glass)
Amorphous Silicon Dioxide (SiO2)
Mineraloid
Amber
Succinite (approximate formula C10H16O)
mineraloid
Amber
Succinite
Mineraloid
Pearls
Aragonite (calcium carbonate) and Conchiolin
Mineraloid
Amber
Succinite
Mineraloid
Amber
Succinite (C10H16O)
mineraloid
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Fulgurite
Liesegang (Fulgurite)
Mineraloid
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
Mineraloid
Amber (Raw)
Succinite (Fossilized Resin)
mineraloid
Amber
Succinurite (C10H16O)
mineraloid
Amber
Succinite (Carbon-based organic compound; approximate formula C10H16O)
Mineraloid
Amber (with potentially inclusions)
Succinite (Fossilized Tree Resin)
Mineraloid
Fire Opal (in matrix)
Hydrated Silica (SiO2·nH2O)
Mineraloid
Amber / Copal
Succinite (fossilized resin)
mineraloid
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Amber
Succinite (C10H16O)
mineraloid
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Man-made)
mineraloid
Fulgurite
Fulgurite (Lechatelierite-rich fused silica)
mineraloid
Amber
Succinite (Formula: C10H16O)
Mineraloid