Chert (often associated with Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Organic (Non Rock)
Browse organic (non rock) specimens identified by the Rock Identifier community.
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Painted Sandstone
Sandstone (clastic sedimentary rock) with acrylic/artistic coating
sedimentary
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock exposed to metamorphic heat/pressure; Chemical composition is approximately 86%–98% Carbon)
metamorphic
Anthracite Coal
Anthracite
metamorphic
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Amber
Succinite (Formula: C10H16O)
mineral
Amber
Succinite
mineraloid
Amber
Succinite
mineral
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
organic mineraloid
Amber
Succinite (specifically for Baltic amber); chemical formula approximately C10H16O
Mineraloid
Quartzite
Quartzite (SiO2)
metamorphic
Obsidian
Obsidian (volcanic glass)
igneous
Amber
Succinicum (Organic polymer, largely C10H16O)
Organic Mineral
Anthracite Coal
Anthracite
metamorphic
Amber
Succinite (a variety of fossilized tree resin); chemical formula appx. C10H16O
mineraloid
Natural Freshwater Pearl
Calcium Carbonate (Aragonite and Calcite), CaCO3
gemstone
Amber
Succinite (Fossilized Tree Resin), C10H16O
Organic Mineraloid
Amber
Succinite (specifically for Baltic amber); Complex mixture of organic compounds (C10H16O)
Organic Mineraloid
Amber
Succinite (fossilized resin); C10H16O
mineraloid
Metaconglomerate
Metaconglomerate (Quartzite conglomerate)
metamorphic
Amber (Rough)
Amber (Fossilized Tree Resin, succinite)
mineral
Chert (with Iron Staining)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (Fossilized Tree Resin) - C10H16O
mineral
Quartzite with Quartz Veins
Metamorphic Quartz-rich Rock (SiO2)
metamorphic
Ambergris
Ambergris (Coprolite-adjacent/Organic secretion)
mineraloid
Limestone (specifically fossiliferous/skeletal limestone)
Calcium Carbonate (CaCO3)
sedimentary
Chert (potentially Jasper/Common Opal mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Coal (most likely Bituminous or Anthracite)
Coal (organic sedimentary rock)
Sedimentary
Limonite after Marcasite (Propeller Conchoid)
Goethite/Limonite pseudomorph after Marcasite (FeO(OH)·nH2O)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Amber
Succinite (fossilized resin)
Organic Mineraloid
River Pebble (likely Quartzite or Diorite)
Metamorphosed Quartz-rich Rock / Intermediate Igneous Rock
metamorphic
Amber
Succinite (fossilized tree resin)
mineral
Baltic Amber
Succinite (Fossilized Resin)
fossil
Fossilized Bone
Vertebrate fossil (mineralized bone)
fossil
Amber
Succinite (specifically for Baltic amber; fossilized tree resin)
Organic (Sedimentary-associated)
Pink Opal
Hydrated Silicon Dioxide (SiO2 · nH2O)
mineraloid
Amber
Fossilized Tree Resin (Organic Polymer)
gemstone
Chert (variant Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Opal
Hydrated Silica (SiO2·nH2O)
mineral
Amber
Succinite (fossilized resin)
mineral
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary