Amber
Fossilized tree resin; chiefly organic terpenoid resin (not a mineral)
gemstone
Category
Sedimentary (Fossilized Organic Remain)
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Amber
Succinite (a specific common type) or Fossilized Tree Resin (C10H16O)
Mineraloid
Amber (Rough)
Succinite (Resinite)
gemstone
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Fossilized Coral (Petoskey-like or Favosites)
Anthozoa (Fossilized Coral)
sedimentary
Kambaba Jasper (Crocodile Jasper)
Stromatolite (Fossilized Algae)
sedimentary
Amber
Succinite (specifically for Baltic amber); Approximate formula: C10H16O
Organic Gemstone (Mineraloid)
Fossilized Oyster Shell
Gryphaea or Exogyra (Family Ostreidae)
fossil
Polished fossilized wood (likely petrified wood)
Silicified wood; primarily quartz (SiO₂) replacing wood tissue
fossil
Stromatolite fossil in Chert/Jasper
Cyanobacteria / Microcystis (fossilized)
fossil
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
Mineraloid
Fossil Shell
Phylum Mollusca (Bivalvia or Brachiopoda)
fossil
Amber
Succiniferous organic material (Succinite)
fossil
Polished fossil bone fragment
Fossilized bone, likely mammalian or reptilian; exact taxon cannot be determined from the image
fossil
Petrified Wood
Silicified Wood (SiO2)
mineral
Fossilized Shark Tooth (Megalodon or Carcharocles fragment)
Elasmobranchii (Fossilized tooth root / crown section)
fossil
Amber
Succinite
Organic Mineraloid
Fossilized coral or stromatoporoid fragment
Likely tabulate coral (order Tabulata) or stromatoporoid; exact identification requires microscopy
fossil
Petoskey Stone
Hexagonaria percarinata
Sedimentary
Amber
Succinite (C10H16O)
Mineraloid (Organic)
Weathered quartz-rich metamorphic rock, likely quartzite
Quartzite (mostly microcrystalline quartz, SiO₂), possibly altered sandstone
metamorphic
Raw Agate (Chalcedony Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Sand Dollar (Fossilized or Calcium Carbonate Skeleton)
Clypeasteroida (Order)
fossil
Fossil Shell (Bivalve)
Phylum Mollusca, Class Bivalvia
fossil
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Clastic sedimentary rock
sedimentary
Fossilized Shark Tooth (Otodus)
Otodus obliquus
fossil
Polished amber
Amber (fossilized plant resin; primarily organic polymerized terpenes)
gemstone
Polished orbicular jasper
Silicified volcanic tuff or rhyolitic jasper; chiefly microcrystalline quartz (SiO₂) with iron-oxide-rich orbicules
sedimentary
Tumbled amber
Fossilized tree resin; commonly succinite (organic resin, not a mineral)
fossil
Amber
Succinite (organic mineraloid); Chemical formula: C10H16O
mineral
Sandstone (with Iron Siderite Concretion)
Arenite with Ironstone Concretion (FeCO3)
sedimentary
Tumbled amber-like inclusion
Likely amber (fossilized tree resin; complex polymer), but identification is uncertain from the image
gemstone
Sandstone Pebble
Arenite
sedimentary
Sandstone
Sedimentary Clastic Rock (Quartz-rich)
sedimentary
Amber
Succinite
mineral
Fossilized Horn Coral
Rugosa (Tetracoralla)
fossil
Iron-rich chert or weathered ironstone
Microcrystalline quartz (SiO₂) with iron oxides/hydroxides, possibly hematite/goethite
sedimentary