Anthropogenic Specimen (Man Made)

Quartz (Milky Quartz with Iron Staining)

Silicon Dioxide (SiO2)

Shale (Beach-worn)

Laminated Pelite (primarily clay minerals and quartz)

Petrified Wood

Silicified wood (Quartz, Chalcedony, or Opal)

Nephrite Jade (River Bed Pebble)

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Quartzite

Quartzite (SiO2)

Porphyritic Basalt (with Pyrolusite or Iron-oxide staining)

Porphyritic Basalt (Mafic Extrusive)

Green Quartzite (Aventurine-like)

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Wonderstone (Sandstone)

Silicified Quartz Sandstone with Iron Oxide staining

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Pink Tourmaline in Quartz Matrix

Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) with Quartz (SiO2)

Muscovite Mica (with Quartz)

Muscovite (KAl2(AlSi3O10)(OH)2)

Sandstone (Ferruginous)

Arenite (with Hematite/Limonite cement)

Yellow Quartzite (Iron-stained)

Quartzite (primarily SiO2 with Fe2O3 staining)

Chert (and Chert Geode)

Silicon Dioxide (SiO2)

Smoky Quartz (Tumbled)

Smoky Quartz (SiO2 - Silicon Dioxide)

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Rose Quartz and Milky Quartz

Silicon Dioxide (SiO2)

Chert (Jasper/Flint Pebble)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Jasper (Mookaite style)

Jasper (Silica-rich Microcrystalline Quartz, SiO2)

Pink Granite (Water-worn Cobble)

Phaneritic Felsic Intrusive Igneous Rock

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartzite pebble

Quartzite (SiO2)

Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)

Calcite

Sandstone (lithic wacke)

Arenite / Lithic Wacke (mostly SiO2 with rock fragments)

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

Chert (Quartzite-rich River Pebble)

Silicon Dioxide (SiO2)

Sandstone (Quartzite-rich Cobble)

Clastic sedimentary rock (primarily SiO2)

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)

Basalt (River Cobble)

Basalt (Mafic Extrusive Igneous Rock)

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt

Granite (Light-colored quartz/feldspar variety)

Granite (composed primarily of Quartz SiO2 and Feldspar KAlSi3O8)

Nephrite Jade (or Serpentine)

Nephrite (a variety of amphibole mineral tremolite-actinolite) or Serpentine Group minerals

Vesicular Basalt with Opal or Quartz

Vesicular Basalt (Amorphous SiO2.nH2O if Opal)

Blue Lace Agate (Geode/Druzy variant)

Chalcedony (SiO2) with Quartz druzy

Quartzite (Water-worn Pebble)

Metamorphosed Quartz Sandstone (SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) - Variety of Chalcedony/Quartz

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)