Snowflake Obsidian
Volcanic Glass with Cristobalite inclusions (70–75% SiO2)
Igneous
Category
Mineraloid (Anthropogenic)
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Black Obsidian
Obsidian (Amorphous Silicon Dioxide)
igneous
Snowflake Obsidian
Volcanic Glass with Cristobalite Inclusions
igneous
Fulgurite
Lechatelierite
mineraloid
Opal
Hydrated amorphous silica (SiO2·nH2O)
mineraloid
Opal
Hydrated amorphous silica (SiO2·nH2O)
mineraloid
Amber (Tumbled/Polished)
Succinite (Fossilized Tree Resin)
mineraloid
Amber
Succinates
mineraloid
Pink Opal
Hydrated Silicon Dioxide (SiO2 · nH2O)
mineraloid
Black Opal (Kalimaya)
Hydrated Silica (SiO2·nH2O)
mineraloid
Opal
Hydrated silica (SiO2 · nH2O)
mineraloid
Amber
Fossilized Tree Resin (Succinite)
mineraloid
Amber (Copal)
Succinate (Fossilized Tree Resin)
mineraloid
Common Green Opal
Amorphous Hydrous Silica (SiO2·nH2O)
mineraloid
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Amber
Succinite (C10H16O)
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
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Precious Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Amber
Succinite (fossilized tree resin)
mineraloid
Amber
Succinates (C10H16O)
mineraloid
Pearl
Aragonite / Calcium Carbonate (CaCO3)
mineraloid
Opalite
Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)
mineraloid
Amber
Succinite (C10H16O)
mineraloid
Pearl
Calcium Carbonate (Aragonite or Calcite) and Conchiolin
Mineraloid
Amber
Succinate (Succinite for Baltic varieties)
mineraloid
Amber (Baltic)
Succinith (Fossilized Tree Resin)
mineraloid
Amber
Succinite (organic fossilized resin)
mineraloid
Amber
Succinite (approximate formula C10H16O)
mineraloid
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
mineraloid
Amber
Succinite (a specific common type) or Fossilized Tree Resin (C10H16O)
Mineraloid
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Amber
Succinite (C10H16O)
Mineraloid
Amber
Succinite (C10H16O)
mineraloid
Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Amber
Succinite
mineraloid
Fulgurite
Lechatelierite (Silica glass), typically SiO2
mineraloid
Black Pearl (Tahitian Type)
Aragonite / Conchiolin composite (CaCO3)
mineraloid