Shungite
Carbon-rich mineraloid (Amorphous carbon)
mineral
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
Learn about Amorphous Solid in the encyclopedia
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Obsidian
Amorphous volcanic glass (primarily SiO2)
igneous
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Byproduct)
mineraloid
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Obsidian
Amorphous volcanic glass (principally SiO2)
igneous
Sea Glass (often mistaken for Gemstones)
Amorphous Silica (SiO2) with trace additives
mineraloid
Opalite
Synthetic Glass / Man-made Opal Simulant
gemstone
Obsidian
Volcanic Glass (Mainly SiO2)
igneous
Obsidian
Volcanic Glass (SiO2 + impurities)
igneous
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Limonite (Ironstone)
Limonite (FeO(OH)·nH2O)
sedimentary
Limonite or Ironstone Nodule
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
sedimentary
Obsidian
Volcanic Glass (70% or more SiO2)
igneous
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinates (C10H16O)
mineraloid
Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)
igneous
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite inclusions (SiO2 + Fe2O3)
igneous
Amber
Succinite (Organic Gemstone)
mineral
Amber (Baltic)
Succinith (Fossilized Tree Resin)
mineraloid
Snowflake Obsidian
Volcanic glass (SiO2) with Cristobalite (SiO2) inclusions
igneous
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Amber with Inclusion
Succiniferous fossil resin (C10H16O)
mineraloid
Coal (Anthracite)
Anthracite coal (Carbon C)
sedimentary
Amber
Succinite (approximate formula C10H16O)
mineral
Shungite
Shungite (Non-crystalline carbon, C)
mineral
Amber in Matrix
Succinite (Carbon-based organic polymer)
Organic (Sedimentary context)
Coarse Sand or Fine Gravel
Clastic Sediment (unconsolidated)
sedimentary
Limonite (Ironstone)
Hydrated Iron Oxide (FeO(OH)·nH2O)
mineral
Amber
Succinite (C10H16O)
mineral
Portable Ceramic Space Heater
Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements
not a rock (synthetic/industrial object)
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Non-geological / Synthetic
Amber
Succiniferous fossil resin (C10H16O)
mineraloid
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
mineral
Snowflake Obsidian
Vitreous Silica with Spherulite inclusions (Amorphous SiO2)
igneous
Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
mineraloid
Sea Glass (Teal/Turquoise)
Amorphous Silica (SiO2) with trace metal oxides
Anthropogenic (Man-made material processed by nature)
Black Obsidian
Volcanic Glass (Amorphous Silicon Dioxide, SiO2)
igneous
Apache Tear (Obsidian)
Obsidian / Amorphous Volcanic Glass (primarily SiO2)
igneous
Polished garnet beads
Garnet group, commonly almandine–pyrope solid solution (approximately Fe₃Al₂(SiO₄)₃–Mg₃Al₂(SiO₄)₃)
gemstone
Olivine (likely Peridot variety)
Olivine Mineral Group (specifically Forsterite-Fayalite solid solution series); Chemical formula: (Mg,Fe)2SiO4
Mineral
Diamond
Carbon (C), specifically a solid form of the element carbon with atoms arranged in a crystal structure called diamond cubic.
Mineral