Man Made Silicate (Anthropogenic Glass)

Quartz Vein with Iron Staining

Silicon Dioxide (SiO2) with limonite/hematite staining

Quartzite

Quartzite (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Milky Quartz with Matrix

Quartz (Silicon Dioxide, SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Peridot in Basalt/Xenolith

Olivine (Mg, Fe)2SiO4 in Vesicular Basalt

Rose Quartz

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide with trace elements (SiO2 + Ti, Fe, or Mn)

Ferruginous Quartz

Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions

Amazonite (likely mixed with other feldspars/minerals)

Amazonite is a variety of Microcline, which is a tectosilicate mineral, formula KAISi3O8. The mixed beads could include other feldspars or quartz.

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Strawberry Quartz (Hematoid Quartz)

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Orange Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Quartz (Small fragments)

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Chert (specifically Red Chert or Jasper)

Microcrystalline Quartz (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Obsidian

Obsidian (Volcanic Glass, SiO2)

Muscovite Mica (on Quartz Matrix)

Muscovite - KAl2(AlSi3O10)(OH)2

Quartzite River Rock

Quartzite (primarily SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Amethyst (Agate/Chalcedony variety)

Silicon Dioxide (SiO2) with iron impurities

Cubic Zirconia

Zirconium dioxide (ZrO2)

Jasper with Quartz Vein

Silicon Dioxide (SiO2) with impurities

Pyrite

Iron Disulfide (FeS2)

Clear Quartz Point

Silicon Dioxide (SiO2)

Quartz Vein Rock

Quartz (Silicon Dioxide, SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)