Vesicular Basalt (or Scoraceous Basalt)
Basalt with vesicular texture
igneous
Category
Organic (Non Rock)
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Amber
Succinite (organic gemstone, approx. C10H16O)
fossil
Amber
Resinite (Succinite if from the Baltic); Chemical Formula: C10H16O (approximate)
Organic Diamond/Gemstone (often associated with Sedimentary sequences)
Black glassy volcanic rock, likely scoria or obsidian
Vesicular basaltic scoria (probable); possibly dark obsidian
igneous
Amber
Succinite (fossilized resin)
Organic Mineraloid
River Pebble (likely Quartzite or Diorite)
Metamorphosed Quartz-rich Rock / Intermediate Igneous Rock
metamorphic
Amber
Succinite (fossilized tree resin)
mineral
Fossilized Bone
Vertebrate fossil (mineralized bone)
fossil
Amber
Succinite (C10H16O)
gemstone
Weathered iron-stained stone, likely graywacke or altered sandstone
Indeterminate lithic fragment; probable quartz-rich sandstone/graywacke with iron-oxide staining
sedimentary
Leopard Skin Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
sedimentary
Painted Sandstone
Sandstone (clastic sedimentary rock) with acrylic/artistic coating
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Amber
Succinite (fossilized resin)
mineral
Weathered dark flint (chert) pebble
Microcrystalline quartz (SiO₂), commonly called flint or chert
sedimentary
Chert (Green Fossilized Algae or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Basalt pebble
Fine-grained mafic volcanic rock, chiefly plagioclase and pyroxene with possible olivine
igneous
Amber
Succinite (specific to Baltic amber), fossilized tree resin
mineraloid
Amber
Succinite (a fossilized organic resin containing succinic acid)
mineraloid
Fossiliferous Limestone
Carbonate Rock (CaCO3 with organic inclusions)
sedimentary
Sedimentary Rock (Limestone or Siltstone pebble)
Sedimentary rock fragment
sedimentary
Obsidian
Obsidian (volcanic glass)
igneous
Amber
Fossilized Tree Resin (C10H16O)
gemstone
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (Fossilized Tree Resin)
gemstone
Unidentified gray rock fragment
Indeterminate from image; possibly quartz- or feldspar-rich silicate material
mineral
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Melo Melo Pearl (or Golden Chalcedony / Yellow Jasper Sphere)
Non-nacreous calcium carbonate pearl (or SiO2 - Silicon Dioxide)
gemstone
Baltic Amber (Black)
Succinite (Fossilized Tree Resin)
fossil
Quartzite (River Pebble)
Recrystallized Quartz (SiO2)
metamorphic
Pearl
Nacre (aragonite, CaCO₃, with conchiolin)
gemstone
Coal (Bituminous Coal)
Caustobiolith / Sedimentary Rock
sedimentary
Pink Opal
Hydrated Silica (SiO2·nH2O) with Palygorskite inclusions
Mineraloid
Metaconglomerate
Metaconglomerate (Quartzite conglomerate)
metamorphic
Amber (Dark/Black Variety)
Succinite (Resinite), C10H16O
mineral
Quartzite with Quartz Veins
Metamorphic Quartz-rich Rock (SiO2)
metamorphic
Amber
Fossilized Tree Resin (C10H16O)
gemstone
Amber
Fossilized Tree Resin
gemstone
Pink Opal
Hydrated silicon dioxide (SiO2·nH2O) with inclusions
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Black Limestone
Bituminous Limestone (Calcium Carbonate - CaCO3)
sedimentary