Amber
Organic gemstone (Succinite)
Category
Browse organic mineraloid and mineral specimens identified by the Rock Identifier community.
Amber
Organic gemstone (Succinite)
Polished moss agate
Moss agate, a variety of chalcedony (microcrystalline quartz, SiO₂)
Amber
Succinate (Fossilized Tree Resin)
Fossilized bone fragment
Fossil bone, composed chiefly of carbonate-fluorapatite (bioapatite)
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
Chert (Jasper/Chalcedony mix)
Microcrystalline Quartz (SiO2)
Brown translucent mineral fragment, possibly iron-stained quartz or amber
Uncertain; likely quartz (SiO₂) with iron-oxide staining, though amber (fossilized resin) is possible
Amber
Amber (C10H16O)
Pearl
Calcium Carbonate (CaCO3) + Conchiolin
Black Limestone
Bituminous Limestone (Calcium Carbonate - CaCO3)
Limestone with Fossil Fragment
Sedimentary carbonate rock (CaCO3)
Shark Tooth Fossil
Carcharocles megalodon or similar extinct shark tooth
Amber
Succinite (fossilized tree resin), C10H16O
Amber
Succinite (Fossilized Tree Resin, C10H16O)
Amber
Succinates (Fossilized Resin)
Petrified Wood
Silicified Wood (SiO2)
Amber
Fossilized tree resin (Amorphous organic polymer)
Amber
Succinite (fossilized tree resin)
Raw Amber / Resin Mineral
Succinite (Fossilized Tree Resin)
Amber
Fossilized Resin (C10H16O)
Fossilized Tooth Fragment
Vertebrate Fossil (Mammalia indet.)
Black Limestone with Calcite Veining
Bituminous Limestone (CaCO3 with Organic Carbon inclusions)
Pearl
Nacre (aragonite, CaCO₃, in a conchiolin matrix)
Pearl necklace
Pearl: biogenic calcium carbonate, primarily aragonite (CaCO₃), in a conchiolin matrix
Amber
Succinite (Fossilized Resin)
Amber
Succinite (Fossilized Resin)
Graphite-rich metamorphic rock (graphitic schist)
Graphitic schist; chiefly graphite (C), quartz (SiO₂), and mica minerals
Banded Limestone
Calcareous sedimentary rock (CaCO3)
Fossiliferous Sedimentary Rock
Sedimentary Rock with Invertebrate Fossil Imprint
Pyrite
Iron Disulfide (FeS2)
Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
Freshwater Pearl
Aragonite / Biogenic Calcium Carbonate (CaCO3)
Turquoise and Red Coral
CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Corallium rubrum (Red Coral)
Pyrite
Iron Sulfide (FeS2)
Shark Tooth Fossil
Carcharhiniformes or Lamniformes (order level fossil)
Fossilized Shark Tooth
Chondrichthyes (class)
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
Limestone (or Sandstone)
Calcium Carbonate (CaCO3) / Silica (SiO2)
Sandstone (with Moss)
Quartz Arenite / Sandstone
Poppy Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
Fossilized Bone Fragment
Vertebrate Fossil
Graphite
Graphite (Carbon, C)