Man Made Material, Not A Natural Rock Or Mineral Specimen

White Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)

Petoskey Stone

Hexagonaria percarinata (Fossilized Coral)

Ruby (Corundum)

Aluminum Oxide (Al2O3) with Chromium traces

Chert (specifically Jasper or Flint variety)

Cryptocrystalline Quartz (SiO2)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Druzy Quartz on Matrix (likely Limestone or Sandstone)

Silicon Dioxide (SiO2) with various trace impurities

Jasper

Jasper (Silicon Dioxide, SiO2)

Fire Opal (in Matrix)

Hydrated Silica (SiO2·nH2O)

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Boxwork Quartz / Septarian Jasper

Boxwork (SiO2 with iron oxide inclusions)

Diamond

Diamond (Pure Carbon, C)

Quartzite Pebble

Quartzite (predominantly Silicon Dioxide - SiO2)

Sandstone (likely with Quartz Veining)

Arenite (primarily SiO2)

Smoky Quartz (with Hematite inclusions)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Heat-Treated Citrine (Amethyst-based)

Quartz (Silicon Dioxide) - SiO2

Shale

Shale (fine-grained clastic sedimentary rock)

Quartz on Host Rock

Silicon Dioxide (SiO2)

Chrysocolla on Matrix

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

Conglomerate

Clastic sedimentary rock (Puddingstone)

Orca Agate (Blue Chalcedony)

Silicon Dioxide (SiO2)

Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)

Mixed Silicates and Oxides (predominantly SiO2 group minerals)

Sparkling Druzy Quartz on Matrix

Silicon Dioxide (SiO2) with iron oxide inclusions

Halite

Halite (NaCl)

Conglomerate

Conglomerate rock

Quartzite

Quartzite (primarily SiO2)

Sandstone (Pebble/Cobble)

Arenite (primarily SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Shale with Iron Oxide Staining

Fissile Mudstone (primarily clay minerals and quartz)

Blue Quartz (specifically Dumortierite Quartz)

SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)

Red Sandstone

Arenite (with Iron Oxide cement)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Sandstone (with potential iron-oxide weathering)

Arenite (SiO2 based)

Muscovite Mica (in Quartz matrix)

Potassium aluminum silicate hydroxide fluoride (KAl2(AlSi3O10)(F,OH)2)

Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Blue Quartzite (Dyed)

Silicon Dioxide (SiO2) with inclusions

Sandstone Concretion

Arenaceous concretion (primarily SiO2 with Fe2O3 staining)

Rough Emerald/Green Beryl

Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium

Sandstone

Arenite (SiO2 based)

Tumbled Stones (various)

Mixed Silica-based Minerals (primarily Quartz and Chalcedony)