Sandstone (Pebble/Conglomerate fragment)
Sandstone (clastic sedimentary rock)
Sedimentary Rock
Category
Anthropogenic (Man Made Material Processed By Nature)
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Quartz (in matrix)
Quartz (SiO₂)
mineral
Petrified Wood
Silicified wood (Quartz/Chalcedony)
Sedimentary
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Hematite
Hematite (Fe2O3)
mineral
Sandstone
Arenite or Sandstone
Sedimentary Rock
Basalt
Basalt
igneous
Orbicular Jasper
Silicon Dioxide (SiO2), variety of Chalcedony
Mineral
Fossil Coral
Coral Limestone (a type of biogenic sedimentary rock)
Sedimentary
Obsidian (likely Golden Sheen Obsidian or Rainbow Obsidian, given the subtle sheen visible on some beads)
Obsidian (volcanic glass, predominantly SiO2 with various impurities)
Igneous
Granite (weathered/river-tumbled)
Granite (Plutonic Igneous Rock)
Igneous Rock
Unknown Organic Object (likely a berry or fruit)
Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.
Organic Material (likely a fruit or berry)
Magnetic Hematite
Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)
Mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Peridot
Olivine (specific variety: gem-quality forsterite), (Mg,Fe)2SiO4
Mineral
Clear Quartz (or Rock Crystal)
Quartz (SiO₂)
Mineral
Fossilized Wood (Petrified Wood)
Silicified Wood (primarily quartz/chalcedony replacing organic matter)
Sedimentary (with some aspects of mineral replacement)
Pebble or Cobble (likely composed of sandstone or conglomerate)
Clastic Sedimentary Rock (specific name like sandstone, conglomerate, or breccia would require microscopic analysis of clast size and angularity)
Sedimentary Rock (possibly a conglomerate or coarse-grained sandstone)
Greisen (Quartz-Muscovite-Turretine Rock)
Greisen
Metamorphic Rock
Amber
Fossilized Tree Resin (Amorphous Hydrocarbon)
Mineral
Dog (Sleeping)
Canis familiaris (or Canis lupus familiaris)
Organic/Biological
Quartzite
Quartzite (primarily SiO2)
metamorphic
Amber (Black)
Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)
Mineraloid
Unakite
Epidote-Feldspar rock
Metamorphic Rock
River Stone (Quartzite/Siltstone)
Quartzite (primarily SiO2)
metamorphic
Schist
Schist (various mineral compositions)
Metamorphic
Granite Pebble
Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica/amphibole)
igneous
Amber
(C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.
Mineral
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)
Metamorphic Rock
Chert (varieties: Flint or Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Peridot (Olivine)
Olivine ((Mg,Fe)2SiO4)
Mineral
Rutilated Quartz
SiO2 (Quartz) with TiO2 (Rutile inclusions)
Mineral
Agate (or Banded Agate)
Agate (a variety of Chalcedony, which is a cryptocrystalline form of Quartz); Chemical Formula: SiO₂ (Silicon Dioxide)
Mineral, specifically a Cryptocrystalline Quartz variety
Ferruginous Quartz
Quartz (Silicon Dioxide) with Iron Inclusion, SiO2
mineral
Chalcedony (Banded/Mottled Variety)
Chalcedony (a cryptocrystalline variety of Quartz, SiO2)
Mineral
Granite
Granite (a felsic intrusive igneous rock)
Igneous Rock
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Granite
Granite (a plutonic igneous rock)
Igneous
Granite (likely a river or beach pebble)
Granite (a felsic intrusive igneous rock primarily composed of quartz, feldspar, and mica)
Igneous
Talc
Talc (Mg₃Si₄O₁₀(OH)₂)
Mineral
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary