Man Made Mineral Simulant (Glass)

Chert (Field-collected Arrowhead-shaped Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Sandstone

Arenite (SiO2 based)

Chert (Grey-Green Flint)

Microcrystalline silicon dioxide (SiO2)

Marble

Metamorphic Limestone (CaCO3)

Granite (weathered pebble)

Granite (plutonic igneous rock)

Chert (specifically Black Chert or Flint)

Cryptocrystalline Quartz (SiO2)

Coquina

Biogenic Limestone (Calcite/Aragonite base, CaCO3)

Sunstone

Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)

Obsidian

Obsidian (volcanic glass)

Diamond

Native Carbon (C)

Rough Diamond

Diamond (pure Carbon, C)

Natural Pearl (appearing in a jewelry setting)

Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin

Chert (and Jasper/Chalcedony mixture)

Microcrystalline Quartz (SiO2)

Beaded Jewelry (Assorted Gemstones)

Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ

Chert (Flint)

Silicon dioxide (SiO2)

Chert (specifically Zebra Chert/Flint)

Silicon Dioxide (SiO2)

Granite

Granite (phaneritic intrusive igneous rock consisting of quartz, feldspar, and mica)

Diamond in Kimberlite

Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous)

Arenite (SiO2 with Fe2O3 inclusions)

Granite

Granite (a phaneritic intrusive igneous rock)

Pearl

Calcium Carbonate (CaCO3) with Conchiolin

Chert (often called Flint for darker varieties)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (and Jasper/Flint variety)

Cryptocrystalline Quartz (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Crushed Stone / Gravel

Aggregatus saxum (variable mineral composition)

Bituminous Coal (with Anthracite or Vitrinite inclusion)

Organic-rich Sedimentary Rock (Carboniferous classification)

Amber (Copal)

Organic gemstone, fossilized tree resin (often immature amber or copal)

Pearl

Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)

Diamond (in jewelry setting)

Carbon (C)

Nacre (Mother of Pearl)

Nacre (Biogenic Aragonite/Calcite composite, CaCO3)

Diamond (in jewelry setting)

Adamantine Carbon (C)

Diorite (Gneissic)

Diorite

Chert (Iron-stained)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Vesicular Basalt (or Scoria)

Vesicular Basalt

Obsidian

Obsidian (volcanic glass, amorphous silica rich rock)

Sandstone

Arenite

Dyed Quartz (imitating Emerald/Green Quartz)

Silicon Dioxide (SiO2) with artificial pigment

Pearl

Aragonite (CaCO3 with conchiolin)

Pyrulite (Pyrite / Chalcopyrite)

Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)

Jade (likely Nephrite or Jadeite)

Nephrite (a variety of actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)