Opalite
Synthetic Glass, SiO2 base with metallic inclusions
mineraloid (synthetic)
Category
Mineraloid
Browse mineraloid specimens identified by the Rock Identifier community.
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Amber
Succinite (formula varies, primarily C10H16O)
Mineraloid (Organic)
Libyan Desert Glass
Tektite (high-silica impact glass), SiO2 + tracing minerals
mineraloid / impactite
Slag (Industrial Glass Slag)
Amorphous Silica / Ferro-silicate Slag
mineraloid / anthropogenic
Red Amber (Burmite/Cherry Amber)
Succinite / Retinite (Organic Fossilized Resin, C10H16O)
Mineraloid (Organic)
Amber
Succinite (fossilized resin)
Organic Mineraloid
Amber
Succinite (with empirical formula approximately C10H16O)
Organic Mineraloid
Amber
Succinite (Formula: C10H16O)
Organic Mineraloid
Amber
Succinite (Fossilized Resin C10H16O)
Organic Mineraloid
Pearl (Imitation or Cultured)
Calcium Carbonate (Aragonite/Calcite) - CaCO3
Mineraloid (Organic)
Slag (Industrial Glass)
Artificial Vitreous Silicate
mineraloid (anthropogenic)
Amber
Succinite (fossilized resin)
Organic Mineraloid
Amber (Burmite)
Fossilized tree resin (Succinite variant)
Organic mineraloid
Amber
Succinite
Organic (Mineraloid)
Amber
Succinite
Organic (Mineraloid)
Amber
Succinite (C10H16O)
Organic Mineraloid
Amber
Succinite (formula varies, primarily C10H16O)
Mineraloid (Organic)
Sea Glass
Amorphous Silica (SiO2) with various additives
Mineraloid (Anthropogenic)
Amber
Succinite (specifically Baltic Amber) - Formula: C10H16O (approximate)
Organic Mineraloid
Amber
Succinite
Organic mineraloid
Amber
Succinite (specifically for Baltic amber; general formula C10H16O)
Mineraloid (Organic)
Pearl (in a decorative hair comb setting)
Calcium carbonate (CaCO3) primarily as Aragonite, bonded with Conchiolin
Organic Mineraloid
Opalite
Man-made Glass (SiO2 + additives)
mineraloid (synthetic)
Amber
Succinite (Formula: C10H16O)
Organic Mineraloid
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
organic mineraloid
Amber
Succinicum (Succinite); C10H16O
Mineraloid (Organic)
Amber
Succinite
Organic Mineraloid
Amber
Succinite (specific to Baltic amber), fossilized tree resin
Organic Mineraloid
Amber
Succinite (a specific high-quality amber from the Baltic)
Organic Mineraloid
Slag
Ferrous slag (by-product of iron smelting)
Mineraloid / Anthropogenic
Amber
Succinite (fossilized tree resin)
Organic Mineraloid
Moldavite
Silica glass with small amounts of aluminum, iron, and other elements
Mineraloid / Tektite
Polished black stone egg, probably black obsidian
Obsidian, a natural volcanic glass; composition primarily silica-rich glass (approximately SiO₂), with variable iron and other trace elements
gemstone
Obsidian
Obsidian (volcanic glass)
Igneous
Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
gemstone
Tumbled amber-like gemstone
Likely amber (fossilized resin; organic mineraloid), possibly citrine or yellow-brown glass imitation
gemstone
Polished amber
Amber (fossilized plant resin), commonly succinite; organic mineraloid rather than a true mineral
gemstone
Orange cabochon gemstone, likely amber or amber-like resin
Natural amber: fossilized plant resin (organic mineraloid), commonly succinite; exact identification requires testing
gemstone
Opalite
Synthetic Opalite Glass
mineraloid (man-made)
Slag Glass
Amorphous Silica Glass (with metal oxide inclusions)
Mineraloid / Industrial Waste
Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3 with Carotenoid pigments)
Mineraloid (Organic Gemstone)
Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)
Chalcedony (SiO₂)
Mineral (or mineraloid if microcrystalline)