Mineraloid

White Precious Opal

Hydrated Silica (SiO2·nH2O)

Limonite (Hydrated Iron Oxide / Bog Iron)

FeO(OH)·nH2O

Amber (Copal)

Succinate (Fossilized Tree Resin)

Common Green Opal

Amorphous Hydrous Silica (SiO2·nH2O)

Amber (Tumbled/Polished)

Succinite (Fossilized Tree Resin)

Amber

Succinates

Pink Opal

Hydrated Silicon Dioxide (SiO2 · nH2O)

Black Opal (Kalimaya)

Hydrated Silica (SiO2·nH2O)

Opal

Hydrated silica (SiO2 · nH2O)

Amber

Succinate (Fossilized Tree Resin)

Amber

Succinite (C10H16O)

Tektite (Indochinite)

Tektite (High-silica natural glass)

Tektite (Indochinite)

Tektite (High-silica natural glass)

Bumblebee Jasper

Anhydrite-Aragonite mixture with Orpiment and Realgar

Opalite

Synthetic glass (SiO2 + metal additions)

Amber

Succinate (Fossilized Tree Resin)

Precious Opal

Hydrated Silica (SiO2·nH2O)

Amber

Succinite (fossilized tree resin)

Amber

Succinates (C10H16O)

Pearl

Aragonite / Calcium Carbonate (CaCO3)

Opalite

Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)

Amber

Succinite (C10H16O)

Pearl

Calcium Carbonate (Aragonite or Calcite) and Conchiolin

Amber

Succinate (Succinite for Baltic varieties)

Amber (Baltic)

Succinith (Fossilized Tree Resin)

Amber

Succinite (organic fossilized resin)

Amber

Succinite (approximate formula C10H16O)

Cobalt Glass Slug (Cullet)

Man-made Silicate Glass with Cobalt Oxide (CoO)

Amber

Succinite (a specific common type) or Fossilized Tree Resin (C10H16O)

Amber

Succinate (Fossilized Tree Resin)

Amber

Succinate (Fossilized Tree Resin)

Leland Blue Stone

Anthropogenic Iron Smelting Slag

Amber

Succinite (C10H16O)

Amber

Succinite (C10H16O)

Opal

Hydrated Silica (SiO2·nH2O)

Amber

Succinite

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial byproduct)

Fulgurite

Lechatelierite (Silica glass), typically SiO2

Black Pearl (Tahitian Type)

Aragonite / Conchiolin composite (CaCO3)

Fulgurite

Luechatelierite (SiO2 glass)

Amber

Succinicum (Formula: C10H16O)

Amber

Succinit (C10H16O)