Fossiliferous Limestone
Calcium Carbonate (CaCO3) with marine fossils
fossil
Category
Sedimentary (Fossilized)
Browse sedimentary (fossilized) specimens identified by the Rock Identifier community.
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Petoskey Stone
Hexagonaria percarinata
fossil
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Fossilized Sea Urchin (Echinoid)
Echinoidea (Class); commonly Clypeasteroida for sand dollar types
sedimentary (fossil)
Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
Organic Gemstone (Sedimentary classification)
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite organic gemstone
mineral
Amber
Succinite
Mineraloid
Amber
Succinite (C10H16O)
mineral
Ammonite Fossil
Ammonoidea
fossil
Amber
Resinite (Succinite if from the Baltic); Chemical Formula: C10H16O (approximate)
Organic Diamond/Gemstone (often associated with Sedimentary sequences)
Fossilized Rugose Coral (Horn Coral)
Order Rugosa
fossil
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Fossil Coral (Rugosa or Solitary Coral)
Rugosa (Order), often referred to as 'Horn Coral' (Lithostrotionella or Grewingkia)
sedimentary
Fossil Shark Tooth
Chondrichthyes (class); likely Lamniformes (order) fossilized in Apatite/Hydroxyapatite
fossil
Fossil Shark Tooth
Lamniform (Mackerel Shark) fossil tooth, likely Otodus or Cretalamna
fossil
Polished tree agate (likely)
Chalcedony (microcrystalline SiO₂) with green dendritic/inclusion minerals
mineral
Coral Fossil
Anthozoa (Scleractinia)
fossil
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Amber
Succinite
Organic Mineraloid
Tiger's Eye
Titanium-containing Quartz (Silica: SiO2)
Mineral
Fulgurite
Fulgurite (Lechatelierite), amorphous SiO2
metamorphic
Fossil Coral
Anthozoa (Scleractinia)
fossil
Amber
Succiniferous fossil resin (C10H16O)
gemstone
Amber
Succinates (C10H16O)
mineraloid
Amber
Succinates (Organic compound: C10H16O)
mineraloid
Amber
Succinite (specifically Baltic Amber) - Formula: C10H16O (approximate)
Organic Mineraloid
Pearl
Aragonite (CaCO3) with Conchiolin
mineral
Amber
Succinates
mineraloid
Fossil Shark Tooth
Carcharocles or Lamniformes (order)
fossil
Petrified Coral (Agatized Coral)
Fossilized Anthozoa (Silicon Dioxide replacement - SiO2)
fossil
Petoskey Stone
Hexagonaria percarinata (Silicified/Calcitic)
fossil
Peanut Wood
Petrified Wood (Silicified Araucaria with Teredo boreholes)
fossil
Coral Fossil
Anthozoa (order Scleractinia)
fossil
Shark Tooth Fossil
Carcharodonta (order Lamniformes), likely Carcharias spp.
fossil
Fossil Brachiopod
Phylum Brachiopoda
fossil
Slate
Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.
sedimentary
Fossil shell fragment (likely brachiopod or bivalve)
Indeterminate fossilized carbonate shell; likely Brachiopoda or Bivalvia
fossil
Amber and Jadeite Beads
Fossilized Tree Resin and Sodium Aluminum Silicate
gemstone
Amber
Succinited (C10H16O)
fossil
Amber
Succinite (C10H16O)
mineraloid
Baltic Amber (Butterscotch or Egg Yolk Variety)
Fossilized Tree Resin (Succinite); Approximate formula: C10H16O
Organic Gemstone (Succinite)
Amber
Succinite (C10H16O)
mineraloid