Chert (Flint)
Microcrystalline Quartz (SiO2)
Category
Browse organic gemstone (succinite) specimens identified by the Rock Identifier community.
Chert (Flint)
Microcrystalline Quartz (SiO2)
Shungite
Non-crystalline carbonoid (Shungite)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Amber
Fossilized Tree Resin
Amber
Succiniferous fossil resin (C10H16O)
River Jasper (Chert/Chalcedony)
Silicon Dioxide (SiO2) with iron oxide impurities
Chert (Jasper/Flint)
Silicon Dioxide (SiO2)
Jasper
Silicon dioxide (SiO2)
Picture Jasper
SiO2
Amber with inclusion
Amber (Fossilized Tree Resin)
Banded Chert
Microcrystalline Quartz (SiO2)
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
Black Jasper
Silicon Dioxide (SiO2) with impurities
Chert (Flint)
Microcrystalline Quartz (SiO2)
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxide
Chert (often called Flint)
Chert (Silicon Dioxide, SiO2)
Chert (Brown Variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Amber
Fossilized Tree Resin
Amber
Fossilized tree resin
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2)
Black Pearl (Tahitian Type)
Aragonite / Pinctada margaritifera (CaCO3 + Conchiolin)
Elephant Skin Jasper
Microcrystalline Quartz (SiO2)
Red Coral
Corallium rubrum
Jasper
Jasper (Silicon Dioxide, SiO2)
Red Chert
Microcrystalline Quartz (SiO2)
Pearl
Calcium Carbonate (Aragonite/Calcite mixed with Conchiolin), CaCO3
Chert (often called Flint)
Microcrystalline Quartz (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Chert (specifically Brown Chert or Jasper)
Microcrystalline Quartz (SiO2)
Chert (White Flint)
Silicon Dioxide (SiO2)
Red Coral (Sponge Coral / Apple Coral)
Corallium rubrum (calcium carbonate / organic gem)
Natural Freshwater Pearl
Calcium Carbonate (Aragonite and Calcite), CaCO3
Chert (Mudstone)
Microcrystalline Quartz (SiO2)
Chert (Basanite / Jasperoid)
Microcrystalline Quartz (SiO2)
Pink Coral
Corallium rubrum (or related species, composed of calcium carbonate)
Chert (Yellow or Brown Jasper)
Microcrystalline Quartz (SiO2)
Polished plume agate
Chalcedony (microcrystalline SiO₂) with iron-oxide inclusions
Pearl
Aragonite / Calcium Carbonate (CaCO3)
Moss Agate
Chalcedony (Silicon Dioxide - SiO2) with inclusions
Fluorite
Fluorite (CaF2)
Amber
Fossilized Tree Resin (Generic formula roughly C10H16O)