Blue Goldstone
Aventurine Glass (Silicon Dioxide infused with Cobalt/Copper)
Category
Browse anthropogenic (human made) sedimentary like material specimens identified by the Rock Identifier community.
Blue Goldstone
Aventurine Glass (Silicon Dioxide infused with Cobalt/Copper)
Diamond
Carbon (C)
Petrified Wood
Silicified Wood (primarily Chalcedony or Quartz, SiO2)
Coquina
Biogenic Limestone (Calcium Carbonate, CaCO3)
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
Petrified Wood
Silicified Wood (SiO2 permineralization)
Quartzite and Chert
Silicon Dioxide (SiO2)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (Lithic arenite / Quartz arenite)
Sandstone
Arenite
Red Chert (Jasper)
Microcrystalline Quartz (SiO2)
Coquina
Biogenic Limestone (Calcite, CaCO3)
Coquina
Coquina (Bioclastic Limestone)
Chalk
CaCO3 (primarily Calcium Carbonate), biogenic sedimentary rock
Sandstone
Arenite (primarily SiO2)
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of organic matter)
Sea Glass
Amorphous Silica (Anthropogenic glass) - SiO2
Granite
Phaneritic intrusive igneous rock (consisting mainly of Quartz, Alkali Feldspar, and Plagioclase)
Sandstone
Arenite (primarily SiO2)
Banded Calcite or Travertine
Calcium Carbonate (CaCO3)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Crinoid Fossil Stem Segment
Class Crinoidea (Echinodermata)
Lapis Lazuli
Complex metamorphic rock containing Lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), Calcite, and Pyrite
Chert (or possibly Flint)
Chert (variant: Flint)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Asphalt (Aggregate)
Bituminous macadam / Concrete Aggregate
Quartzite
Quartzite (SiO2)
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Arenite with Iron Oxides
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
Brain Coral Fossil
Family Mussidae or Merulinidae (Order Scleractinia)
Sandstone
Arenite (Sedimentary rock comprising sand-sized grains)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Sandstone
Arenite (primarily SiO2)
Goldstone (Red)
Aventurine Glass (SiO2 + Cu)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone (specifically Banded Sandstone)
Clastic sedimentary rock (primarily SiO2)
Lemon (Mock specimen mimicking Citrine/Sulfur)
Citrus x limon
Chert (Jasper variation)
Silicon Dioxide (SiO2)
Synthetic Resin / Plastic Figurine
Synthetic Polymer (Copolymer of Polyethylene or Resin)