Cullet Glass (Slag)
Amorphous Silicon Dioxide (Man-made)
Mineraloid
Category
Organic Mineraloid
Browse organic mineraloid specimens identified by the Rock Identifier community.
Learn about Organic Mineraloid in the encyclopedia
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Tektite (Indochinite)
Impact Glass (SiO2 + Al2O3)
mineraloid
Slag (Industrial Glass)
Anthropogenic Amorphous Vitreous Silicate
mineraloid
Common Opal
SiO2·nH2O (Hydrated Silicon Dioxide)
mineraloid
Green Opal
Hydrated amorphous silica (SiO2·nH2O)
mineraloid
Pearl
Calcium carbonate (CaCO3) - mainly Aragonite with Conchiolin
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
White Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineraloid
Black Opal
Hydrated silica (SiO2·nH2O)
mineraloid
Amber
Succinite (C10H16O)
mineraloid
Fulgurite
Liesegang (Fulgurite)
Mineraloid
Opal
Hydrated silica (SiO2·nH2O)
mineraloid
Fire Opal (in matrix)
Hydrated Silica (SiO2·nH2O)
Mineraloid
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Man-made)
mineraloid
Amber (specifically Burmese Amber or Burmite)
Succiniferous fossil resin (C10H16O)
mineraloid
Fulgurite
Fulgurite (Lechatelierite-rich fused silica)
mineraloid
Ethiopian Opal (Welo Opal)
Hydrated Amorphous Silica (SiO2·nH2O)
mineraloid
Dragon's Breath (Mexican Opal Glass)
Artisan Foil Glass (SiO2 based)
mineraloid
Cobalt Blue Slag Glass
Amorphous Silicon Dioxide (anthropogenic) with Cobalt additives
mineraloid
Sea Glass (often mistaken for Gemstones)
Amorphous Silica (SiO2) with trace additives
mineraloid
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
mineral
Black Opal (Kalimaya)
Hydrated Silica (SiO2·nH2O)
mineraloid
Opal
Hydrated silica (SiO2 · nH2O)
mineraloid
Amber
Fossilized Tree Resin (Succinite)
mineraloid
Common Green Opal
Amorphous Hydrous Silica (SiO2·nH2O)
mineraloid
Tektite (Indochinite)
Tektite (High-silica natural glass)
mineraloid
Tektite (Indochinite)
Tektite (High-silica natural glass)
mineraloid
Bumblebee Jasper
Anhydrite-Aragonite mixture with Orpiment and Realgar
mineraloid
Opalite
Synthetic glass (SiO2 + metal additions)
mineraloid
Precious Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Pearl
Aragonite / Calcium Carbonate (CaCO3)
mineraloid
Opalite
Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)
mineraloid
Amber (Baltic)
Succinith (Fossilized Tree Resin)
mineraloid
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
mineraloid
Leland Blue Stone
Anthropogenic Iron Smelting Slag
mineraloid
Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial byproduct)
mineraloid
Fulgurite
Lechatelierite (Silica glass), typically SiO2
mineraloid
Black Pearl (Tahitian Type)
Aragonite / Conchiolin composite (CaCO3)
mineraloid