Mineral (Man Made Glass, Not Natural)

Chert (with nodule)

Microcrystalline Quartz (SiO2)

Citrine

Quartz (SiO2) - specifically, a variety of macrocrystalline quartz

Amethyst and Smoky Quartz (Tumbled)

Silicon Dioxide (SiO2) with trace impurities iron (Amethyst) and aluminum/radiation (Smoky Quartz)

Rough Diamond / Clear Quartz

C (Carbon) or SiO2 (Silicon Dioxide)

Rough Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Sapphire

Corundum (Al2O3)

Quartz Pebble in Arkosic Sand

Silicon Dioxide (SiO2)

Smoky Quartz (Tumbled)

Smoky Quartz (Silicon Dioxide - SiO2)

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite mica; Chemical formula: SiO2 + K(Al,Cr)2AlSi3O10(OH)2

Yellow Quartz (Citrine Quartzite)

Silicon Dioxide (SiO2)

Likely iron-rich slag or weathered ironstone

Hematite–goethite-rich material (Fe₂O₃/FeO(OH)); possibly industrial iron slag

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial dye

Diamond

C (Carbon)

Polished blue-banded agate slice

Agate (microcrystalline quartz, SiO₂; chiefly chalcedony)

Green Aventurine

Quartz (Silicon Dioxide) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Red Sandstone

Arenite (Ferruginous Sandstone)

Smoky Quartz

Silicon Dioxide (SiO2)

Citrine

Silicon Dioxide (SiO2)

Yellow Quartz

Silicon Dioxide (SiO2)

Citrine Quartz (Yellow Quartz)

Silicon Dioxide (SiO2) with iron impurities

Yellow Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Chert (Green and Black Jasper variant)

Cryptocrystalline Quartz (SiO2)

Clear Quartz (Tumbled)

Quartz (Silicon Dioxide - SiO2)

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Rough Diamond

Diamond (Native Carbon, C)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Smoky Quartz with Hematite inclusions

Silicon Dioxide (SiO2) with Fe2O3 inclusions

Chert (Flint)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Granite

Granite (Mainly Quartz, Feldspar, and Mica)

Jasper with Hematite

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

Citrine Quartz

Silicon Dioxide (SiO2)

Quartzite

Quartzite (Metamorphic Quartz Sandstone)

Tumbled mahogany obsidian

Volcanic glass; primarily SiO₂ with iron-oxide-rich brown inclusions

Sandstone (Weathered Coastal Boulder)

Arenite (composed primarily of SiO2)

Granite

Phaneritic plutonic rock (SiO2 primary)

Sandstone (Quartzose type)

Arenite (primarily SiO2)

Quartz (Yellow / Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Raw emerald-bearing beryl (probable)

Beryl, Be₃Al₂Si₆O₁₈; green color from trace chromium and/or vanadium

Sandstone

Arenite (SiO2 based)