Not A Rock (Man Made Polymer)

Chert (often called Flint for darker varieties)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (and Jasper/Chalcedony mixture)

Microcrystalline Quartz (SiO2)

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)

Chert (specifically Black Chert or Flint)

Cryptocrystalline Quartz (SiO2)

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Crackled Quartz (Blue Dyed)

Silicon Dioxide (SiO2) with anthropogenic dye

Diamond (or Diamond Simulant)

Carbon (C)

Chert (Field-collected Arrowhead-shaped Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Native Silver

Silver (Ag)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chert (specifically Gray/Blue-Gray Chert)

Chert (SiO2)

Pyrite

Iron Sulfide (FeS2)

Chert (specifically Zebra Chert/Flint)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variant)

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Common Marble

Calcium Carbonate (CaCO3)

Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate')

Silicon Dioxide (SiO2) with artificial pigment

Baltic Amber (Butterscotch or Egg Yolk Variety)

Succinite (chemical formula: C10H16O)

Jade (likely Jadeite)

Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)

Rough Diamond

Diamond (Pure Carbon: C)

Amber

Fossilized Tree Resin (Amorphous Hydrocarbon)

3D Printed PLA Elephant (Silk Multi-color)

Polylactic Acid (C3H4O2)n

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Pyrite

Iron Disulfide (FeS2)

Sea Glass (Teal/Turquoise)

Amorphous Silica (SiO2) with trace metal oxides

Sea Glass (Turquoise/Aqua)

Amorphous Silica (SiO2) with transition metal dopants

Pearl (Biogenic Mineraloid)

Calcium carbonate (Aragonite) and Conchiolin, CaCO3

White Marble

Recrystallized Calcite (CaCO3)

Green Banded Chert (Agate/Jasper)

Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite

BROWN GRANITE (likely 'Tan Brown' or similar)

Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)

Nephrite Jade

Nephrite

Chert (Jasper/Flint variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint variety)

Chert (Microcrystalline or Cryptocrystalline Quartz), SiO2

Lapis Lazuli

A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).

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.

Sea Glass (Frosted Glass)

Amorphous Silica (SiO2) with various metal oxide impurities

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)

Chalcedony (SiO₂)

Amber

Amber (Fossilized Tree Resin)

Basalt Cobble

Vesicular Basalt (Mafic Extrusive)

Granodiorite

Granodiorite

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock