Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Category
Organic (Non Rock)
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Anthracite Coal
Anthracite
metamorphic
Yellow Jasper
Silicon dioxide (microcrystalline quartz, SiO2)
sedimentary
Coal (likely Bituminous or Lignite)
Organic Sedimentary Rock (Carbonaceous)
sedimentary
Amber (Raw Copal)
Fossilized Plant Resin (Gummite/Succinite)
mineral
Fossiliferous Shale
Carbonaceous Shale (with potential plant/aquatic fossils)
sedimentary
Amber
Succinite (Resinite)
fossil
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (a common variety of fossilized resin)
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Amber
Succinite (with a generalized formula of C10H16O)
mineral
Amber
Succinite (C10H16O)
gemstone
Amber
Succinite (fossilized resin)
mineral
Quartzite
Metamorphic Quartz Rock
metamorphic
Amber
Succinite (Resin C10H16O)
mineral
Generic Pebble
Lithic Fragment
sedimentary
Eclogite
Eclogite (High-pressure metamorphic rock)
metamorphic
Chert (often associated with Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Dark mafic rock, possibly basalt
Likely basalt; precise identification is uncertain from the image
igneous
Chert (and/or Siltstone River Pebble)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Amber
Succinite (specifically for Baltic amber); Fossilized Tree Resin (C10H16O)
Organic Mineraloid
Amber
Succinite (specifically for Baltic amber); Chemical formula approximately C10H16O
mineral
Amber
Succinite (Formula: C10H16O)
mineral
Quartzite
Quartzite (Recrystallized Quartz Sandstone)
metamorphic
Chert (specifically Chalcedony or Flint variation)
Microcrystalline Quartz (SiO2)
sedimentary
Rounded green-gray pebble, possibly andesite or basalt
Undetermined fine-grained volcanic rock; visual identification is uncertain
igneous
Amber
Succinite
mineral
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
organic mineraloid
Amber
Succinite
mineraloid
Amber
Succinite (specifically for Baltic amber); chemical formula approximately C10H16O
Mineraloid
Fish Fossil in Limestone
Lycoptera (likely) in Micritic Limestone
sedimentary
Amber
Succinite (a variety of fossilized tree resin); chemical formula appx. C10H16O
mineraloid
Anthracite Coal
Anthracite
metamorphic
Painted River Rock
Polished fluvial clast with acrylic/synthetic pigment coating
Sedimentary or Metamorphic (base substrate)
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Shale
Laminated Mudstone (Shale)
sedimentary
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic