Goldstone
Avventurina (Cu + SiO2 glass)
mineral
Category
Not A Rock (Man Made Polymer)
Browse not a rock (man made polymer) specimens identified by the Rock Identifier community.
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Green Aura Quartz
Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)
mineral
Amber with Inclusion
Succiniferous fossil resin (C10H16O)
mineraloid
Turquoise (likely stabilized or simulated Howlite)
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Quartz (Pebble)
Quartz (SiO₂)
Mineral
Amber
Succinite (Fossilized Resin)
mineral
Amber
Succinite (Resinite)
mineraloid
Amber
Succinite (fossilized tree resin)
mineral
Amber
Succinite (Fossilized Tree Resin), C10H16O
Organic Mineraloid
Amber
Succinurite (C10H16O)
mineraloid
Amber
Succinite
mineraloid
Tumbled amber-like inclusion
Likely amber (fossilized tree resin; complex polymer), but identification is uncertain from the image
gemstone
Amber (likely rough amber)
Fossilized plant resin; predominantly polymerized terpenoid resin (succinite if Baltic-type)
gemstone
Amber
Succinite (Fossilized Tree Resin) - C10H16O
mineral
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Biological Bone (Patella/Knee)
Patella (part of the Human Skeletal System)
Organic Structure (Not a Rock)
Diamond (Cut jewelry specimen)
Diamond (pure Carbon, C)
mineral
Ruby in Matrix
Corundum (Al2O3)
mineral
Coquina
Bioclastic Limestone
sedimentary
Coquina
Bioclastic Limestone
sedimentary
Petoskey Stone
Hexagonaria percarinata
fossil
Diamond (Cut and Polished)
Diamond (pure Carbon, C)
gemstone
Diamond
Carbon (C)
mineral
Chert (specifically Flint Arrowhead)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Fossil Sea Urchin (Echinoid)
Echinoidea fossil (often replaced by silica or calcite)
fossil
Amber
Succinite (Fossilized Tree Resin)
gemstone
Amber
Succinite (a fossilized organic resin containing succinic acid)
mineraloid
Amber
Succinite (fossilized resin)
mineral
Amber / Copal
Fossilized Tree Resin (Succinate)
Mineraloid
Obsidian
Volcanic Glass (70% or more SiO2)
igneous
Fossiliferous Limestone
Limestone (composed primarily of calcite with included fossils CaCO3)
Sedimentary
Schist
N/A (a rock type, not a mineral formula)
metamorphic
Lapis Lazuli
Lapis Lazuli (Complex rock consisting primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2)
metamorphic
Flint/Chert Nodule in Limestone
Sedimentary rock containing microcrystalline quartz (SiO2) within a calcium carbonate (CaCO3) matrix
sedimentary
Diamond (or Diamond Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Seashell Fragment
Calcium carbonate (CaCO3) - primarily Aragonite or Calcite
fossil
Diamond Plate (Steel)
Alloyed Carbon Steel or Aluminum with 'Durbar' pattern
not a rock (Man-made industrial metal)
Diamond (Cut Gemstone)
Carbon (C)
gemstone
Coquina
Bioclastic Limestone
sedimentary
Amber
Succinite (Approximate formula: C10H16O)
Mineraloid
Tumbled amber
Fossilized tree resin; commonly succinite (organic resin, not a mineral)
fossil
Banded agate pendant (likely carnelian or brown-and-white chalcedony agate)
Agate, a banded variety of chalcedony; microcrystalline quartz, SiO₂, with iron-oxide coloration
gemstone