Mineral, Often A Rock Given Its Aggregate Nature

Halite (Rock Salt)

Halite; NaCl (Sodium Chloride)

Granite

Granite (a felsic intrusive igneous rock)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Honey Calcite (Yellow Calcite)

Calcium Carbonate (CaCO3)

Sandstone

Arenite (composed primarily of Quartz, SiO2)

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Sandstone

Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Green Quartz (Prasiolite)

Silicon Dioxide (SiO2) with trace impurities

N/A (Non-Geological Specimen)

Shale or Argillite

Shale (sedimentary) / Argillite (metamorphic)

Agate (Grey Agate Slice)

Microcrystalline Quartz (SiO2)

Granite (weathered pebble)

Granite (plutonic igneous rock)

Green Druzy Quartz (Prasiolite)

Silicon Dioxide (SiO2) with inclusions (typically Chlorite or Actinolite)

Basalt River Pebble

Basalt (Mafic volcanic rock)

Asphalt (Road Aggregate)

Asphalt concrete / Bituminous mixture

Porphyritic Basalt or Diabase with Plagioclase Phenocrysts

Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Black Veined Jasper (Spiderweb Jasper)

Silicon Dioxide (SiO2)

Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)

There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).

Banded Chert or Chert with Quartz Veins

Chert (SiO2)

Seraphinite

Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.

Scoria

Vesicular Basalt / Scoria

Jasper with Agate and Quartz Inclusions

Silicon Dioxide (SiO2) - Chalcedony / Quartz aggregate

Quartzite

Quartzite

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Liesegang Ring Siltstone

Siltstone with iron oxide Liesegang bands

Not a rock, mineral, or geological specimen

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Native Gold in Quartz

Native Gold (Au)

Banded Gneiss (with possible weathered sulfide or iron staining)

Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides

Coquina or Fossilized Shell Aggregate

Calcareous bioclastic sedimentary rock (CaCO3)

Man-made Synthetic Material (Not a rock or mineral)

Polyester (Polyethylene terephthalate) / Faux Fur

Banded Gneiss

Gneiss (pronounced "nice")

Chrome Diopside

Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Shale (possibly)

Shale (fine-grained clastic sedimentary rock)

Pyrite (on Quartz/Host Rock)

Iron Sulfide (FeS₂)

Chalcedony or Chert/Jasper with secondary mineral staining

SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.

Man-made Synthetic Material (Plastic/Composite)

Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Quartz

Quartz (Silicon Dioxide - SiO2)