Chert (with Drusy Quartz Pocket)
Silicon Dioxide (SiO2)
sedimentary
Category
Organic Materia (Not A Rock Or Mineral)
Browse organic materia (not a rock or mineral) specimens identified by the Rock Identifier community.
Learn about Organic Materia (Not A Rock Or Mineral) in the encyclopedia
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Red Jasper
Silicon dioxide (SiO2) with iron oxide (Fe2O3) inclusions
sedimentary/mineral
Chert (White-Tan variety)
Silicon dioxide (SiO2) / Microcrystalline Quartz
sedimentary
Petrified Wood
Silicified Wood (Permineralized organic matter, głównie $SiO_2$)
fossil
Pink Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Limestone with Calcite Veining
Sedimentary Carbonate Rock (CaCO3)
sedimentary
Petrified Wood (Black / Carbonized)
Silicon Dioxide (Quartz/Chalcedony replacing Organic Matter)
fossil
Lepidodendron Fossil (Scale Tree)
Lepidodendron
fossil
Petrified Wood
Silicified Wood (Quartzo-feldspathic fossil wood)
fossil
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Gray Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Coal (most likely Bituminous or Anthracite)
Coal (organic sedimentary rock)
Sedimentary
Ironstone Concretion
Siderite / Hematite-bearing Sedimentary Rock
sedimentary
Fossilized Bivalve Shell (Fossilized Clam)
Bivalvia (class) / CaCO3 (Calcium Carbonate)
fossil
Amber and Citrine Quartz
Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)
mineral
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with marine fossils
fossil
Chert (Holey Stone)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
sedimentary
Amber
Succinicum (C10H16O)
mineral
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate with Fossils)
sedimentary
Amber
Succinite (with formula approximately C10H16O)
Organic mineraloid
Travertine
Terrestrial Sedimentary Limestone (CaCO3)
sedimentary
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Shale
Shale (clay-sized silicate minerals)
sedimentary
White Coral
Corallium rubrum (biocarbonate calcium) / CaCO3
mineral
Chert Nodules or Concretion
Cryptocrystalline Quartz (SiO2)
sedimentary
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Fossilized Coral
Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)
sedimentary
Fossil-bearing sedimentary rock, possibly fossil wood or bone
Indeterminate silicified/carbonate fossil in sandstone or mudstone
fossil
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Sandstone with Trace Fossils
Quartz Arenite with Bioturbation (Trace Fossils)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony/Opal)
sedimentary
Chert
Chert (SiO2)
sedimentary
Chert / Flint
Chert (Silicon Dioxide, SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Shale or Siltstone
Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)
sedimentary
Chert Nodules in Limestone
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Rock (Invertebrate Fossil in Matrix)
Fossiliferous limestone or shaly matrix containing skeletal fossil remains
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Coal (likely Bituminous or Lignite)
Organic Sedimentary Rock (Carbonaceous)
sedimentary
Pickled Dragon Eggs (Fictional Interpretation: Purple Agate or Amethyst Geodes)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral