Kambaba Jasper
Stromatolite Jasper (Microcrystalline Quartz with Cyanobacteria fossile)
sedimentary
Category
Organic Gemstone (Fossilized Resin)
Browse organic gemstone (fossilized resin) specimens identified by the Rock Identifier community.
Learn about Organic Gemstone (Fossilized Resin) in the encyclopedia
View all →
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Cultured Marble (Synthetic)
Polymer-matrix composite (typically calcium carbonate in polyester resin)
Synthetic / Composite Material
Red Jasper
Silicon Dioxide (SiO2)
sedimentary
Yellow jasper or polished yellow chalcedony
Microcrystalline quartz, SiO₂, likely iron-stained jasper/chalcedony
mineral
Lapidary Wax (imitation/wax model)
Hydrocarbon wax blend with colorant (imitating Lapis Lazuli/Emerald)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Pearl
Calcium carbonate (CaCO3) in the form of Aragonite or Calcite
mineral
Fossil Coral
Cnidaria fossil (often Calcium Carbonate / CaCO3)
sedimentary
Pearl
Aragonite (CaCO3 with conchiolin)
mineral
Fossil Coral (Rugose Coral / Horn Coral fragment)
Rugosa (Tetracoralla) / Calcite (CaCO3)
fossil
Fossil Shell
Phylum Mollusca (Bivalvia or Brachiopoda)
fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Fossilized trilobite
Trilobita; likely an enrolled asaphid or phacopid trilobite
fossil
Fossilized ammonite
Ammonoidea (likely a ribbed Jurassic–Cretaceous ammonite), replaced mainly by calcite or silica
fossil
Fossilized Brachiopod
Phylum Brachiopoda
fossil
Fossilized Coral
Rugose Coral (Order Rugosa) or Tabulate Coral
fossil
Fossilized Coral
Rugose coral / Tabulate coral fossil in limestone matrix
fossil
Fossilized Coral
Rugosa or Tabulate Coral Fossil (Replacement by Silica/Calcite)
fossil
Fossilized Coral
Rugose Coral / Hexagonaria (Fossilized calcium carbonate)
fossil
Fossilized Coral
Hexagonaria (Rugose and Tabulate coral fossils)
fossil
Fossilized Brachiopod
Brachiopoda (likely Order Spiriferida or Productida)
fossil
Fossilized Brachiopod
Phylum Brachiopoda (likely Order Spiriferida or Orthida)
fossil
Fossilized Echinoid
Echinoidea (likely of the order Echinoidea)
fossil
Fossilized Brachiopod
Phylum Brachiopoda (General mineral composition: Calcite/CaCO₃ or Silica/SiO₂)
sedimentary
Fossilized Blastoid
Pentremites (Class Blastoidea)
sedimentary
Fossilized Brachiopod
Articulata (Class) / Brachiopoda (Phylum)
sedimentary
Fossil Shell
Invertebrate fossil (Mollusca)
fossil
Fulgurite
Fulgurite (Lechatelierite or fused sand/quartz)
mineral
Coal
Coal (Combustible sedimentary rock)
sedimentary
Petoskey Stone
Hexagonaria percarinata
sedimentary
Banded River Rock with Quartz Vein
Siltstone/Greywacke with Quartz (SiO2)
sedimentary
Dendritic Opal
Dendritic Common Opal (SiO2·nH2O with Manganese oxide inclusions)
mineral
Sandstone
Arenite (SiO2 variety)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
sedimentary
Fossiliferous Shale (with Vertebrate Bones)
Laminated Mudstone containing Fossilized Bone (Apatite)
sedimentary
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
mineral
Fossilized oyster or bivalve shell
Fossil Gryphaeidae or Ostreoidea; calcitic shell, CaCO₃
fossil
Petoskey Stone
Hexagonaria percarinata (Silicified/Calcitic)
fossil
Coral Fossil
Anthozoa (order Scleractinia)
fossil
Fossilized Brachiopod or Gastropod
Phylum Brachiopoda / Phylum Mollusca
fossil