Man Made Glass (Often Grouped With Minerals In Lapidary)

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Goethite)

Garnet

Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3

Garnet

Garnet Group (often Pyrope or Almandine); X3Y2(SiO4)3

Chrysocolla on Quartz/Rhyolite matrix

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

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Mahogany Obsidian

Volcanic Glass (predominantly SiO2 with Fe2O3 inclusions)

Chert

Chert (Microcrystalline Quartz, SiO2)

Agate Geode

Chalcedony (cryptocrystalline SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Granitoid (Pegmatitic Granite)

Granitoid with dominant Potassium Feldspar and Quartz

Hypersthene (or Enstatite/Ferrosilite)

Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)

Chert / Flint Pebble

Chert (SiO2)

Sandstone

Arenite (SiO2 based)

Quartz (Milky or Smoky variant)

Silicon Dioxide (SiO2)

Malachite

Copper carbonate hydroxide, Cu2CO3(OH)2

Lapis Lazuli

Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Crackled Quartz (Blue Dyed)

Silicon Dioxide (SiO2) with anthropogenic dye

Green Aventurine

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

Quartz Pebble

Silicon Dioxide (SiO2)

Graphic Granite

Graphic Granite (a variety of Pegmatite)

Druzy Quartz on Host Rock

Silicon Dioxide (SiO2)

Ferruginous Quartz (River Pebble)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Red Sandstone (with possible iron oxide staining)

Sandstone (primarily Quartz with Hematite/Goethite cement)

Banded Agate Geode

Silicon Dioxide (SiO2)

Blue Moss Agate / Blue Chalcedony

Silicon Dioxide (SiO2)

Green Aventurine

Silicon dioxide (SiO2) with inclusions of Fuchsite mica

Quartz (Smoky or Impure Variety)

Silicon Dioxide (SiO2)

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Dragons Blood Jasper

Cryptocrystalline Quartz (SiO2/Epidote/Piemontite)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Picture Jasper

SiO2, Microcrystalline Quartz

Blue Quartz (Aventurine)

Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite

Quartz Vein in River Siltstone

Crystalline Quartz (SiO2) in Siliclastic Matrix

Pyrite

Iron Disulfide (FeS2)

Rose Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Vein in Host Rock (Gneiss/Schist)

Silicon Dioxide (SiO2) within a metamorphic matrix

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)