Chert (Flint)
Microcrystalline Quartz (SiO2)
Category
Browse mineraloid like synthetic material specimens identified by the Rock Identifier community.
Chert (Flint)
Microcrystalline Quartz (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limestone (specifically Grainstone or Micrite)
Calcium Carbonate (CaCO3)
Fossilized Gastropod Internal Mold
Steinkern (Mollusca: Gastropoda)
Sandstone
Sedimentary Clastic Rock
Fossiliferous Chert (with Fossil Shells)
Silicon Dioxide (SiO2) with biogenic inclusions
Vesicular Basalt
Mafic Volcanic Rock (Basalt)
Sandstone (Ferruginous)
Arenite with Iron Oxides
Yellow Jasper with Red Inclusion
Silicon Dioxide (SiO2) with Iron Oxides
Chert Pebble
Chert (Silicon Dioxide, SiO2)
Sandstone
Clastic Sedimentary Rock
Sandstone (lithic wacke/conglomerate mix)
Clastic Sedimentary Rock (SiO2 with lithic fragments)
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
Sandstone
Arenite (primarily SiO2)
Red Sandstone
Arenite (predominantly Quartz with Hematite cementation)
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Chert (Common Opal variant)
Microcrystalline Quartz (SiO2)
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
Coral Fossil (Scleractinia)
Scleractinia (Order), primarily CaCO3 (Aragonite or Calcite)
Fossiliferous Sandstone with Plant Remains
Arenite with Carbonaceous impressions (likely Paleozoic/Mesozoic Flora)
Diorite
Diorite (intermediate intrusive igneous rock)
Moss Agate
Silicon Dioxide (SiO2) with inclusions
Petrified Wood
Silicified wood (primarily Quartz, SiO2)
Petrified Wood
Silicified wood (primarily SiO2)
Chert (Chalcedony/Common Opal)
Microcrystalline Quartz (SiO2)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Fe2O3 staining)
Chert / Green Jasper
Silicon Dioxide (SiO2)
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone
Clastic Sedimentary Rock
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline quartz (SiO2)
Limestone with Iron Oxide Staining
Sedimentary Rock (Calcite, CaCO3)
Petrified Wood
Fossilized Wood (silicified wood)
Petrified Wood
Silicified Wood (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Sandstone
Sandstone (Arenite)
Sandstone
Clastic Sedimentary Rock
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
Sandstone
Arenite (primarily SiO2 with various cementing agents)
Sandstone (Beach Pebble)
Clastic sedimentary rock (primarily Quartz and Feldspar)