Man Made Material (Simulated Mineral)

Goldstone

Aventurine Glass (SiO2 + Cu small inclusions)

Blue Goldstone

Aventurine Glass

Diamond

C (Carbon)

Granite

Phaneritic Felsic Igneous Rock

Chalcedony (Agate/Chert variety)

Silicon Dioxide (SiO2)

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite inclusions

Smoky Quartz

Silicon Dioxide (SiO2)

Diamond

Diamond (pure Carbon, C)

Silver (Jewelry form)

Native Silver (Ag)

Dumortierite in Quartz

Dumortierite (Al6O3(BO3)(SiO4)3) with Quartz (SiO2)

Marble

Metamorphic Limestone (CaCO3)

Gemstone bead necklace (likely citrine or yellow quartz)

Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them

Chert (specifically Yellow/Brown Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Swirled Agate Bead

Silicon Dioxide (SiO2)

Rough Diamond

Diamond (pure Carbon, C)

Natural Pearl (appearing in a jewelry setting)

Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin

Amethyst (Tumbled Cabinet Stone)

Silicon Dioxide (SiO2) with iron impurities

Diamond

Native Carbon (C)

Tumbled yellow quartz (likely citrine or iron-stained quartz)

Quartz, SiO₂; yellow color from trace iron or irradiation/heat-related coloration

Breccia

Breccia

Obsidian (Black)

Obsidian (High-silica volcanic glass)

Granite

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

Blue Slag Glass

Amorphous Silica (Industrial byproduct)

Fossilized Coral (Petoskey Stone / Hexagonaria)

Hexagonaria percarinata / Rugosa coral (CaCO3)

Diamond in Kimberlite

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

Dyed Blue Agate Slice

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Chert (Yellow Jasper/Flint)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Granodiorite

Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)

Granite

Felsic intrusive igneous rock

Rutilated Quartz

Quartz with Rutile inclusions (SiO2 with TiO2)

Chrysocolla

Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O

Sandstone (Ferruginous)

Arenite (SiO2 with Fe2O3 inclusions)

Marble

Recrystallized Calcite (CaCO3)

Amethyst

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Granite

Phaneritic Igneous Rock (composed mostly of Quartz, Feldspar, and Mica)

Snowflake Obsidian

Volcanic glass with Cristobalite inclusions (70–75% SiO2)

Blue Chalcedony

Chalcedony (Silicon Dioxide, SiO2)

Pearl

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

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]