Mineral (Variety Of Quartz)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Jasper, Agate, Quartz Mix (Polished Beads)

SiO₂ (Silicon Dioxide) for Quartz. Jasper and Agate are cryptocrystalline varieties of Quartz.

Jasper (Red Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions

Sandstone (Quartz Sandstone)

Arenite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2)

Red Jasper (possibly with Quartz or Hematite)

Silicon Dioxide (SiO2) with iron oxide impurities

Rutilated Quartz

Quartz with Rutile inclusions (SiO2 with TiO2 inclusions)

Chert (Green variety)

Microcrystalline Opaline/Quartz (SiO2)

Quartzite

Quartzite (SiO2)

Fuchsite in Quartz

K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2

Quartzite

Quartzite (composed primarily of Silicon Dioxide, SiO2)

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Peridot (likely, given the color and bead form)

Olivine, variety Peridot (Mg,Fe)2SiO4

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Sandstone (Quartzite-rich Cobble)

Clastic sedimentary rock (primarily SiO2)

Clear Quartz

Silicon dioxide (SiO2)

Quartz with impurities or Host Rock

SiO2 (Silicon Dioxide) with mixed silicates

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Crystal Point

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sandstone (Red/Brown Variety)

Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)

Quartzite

Quartzite (chiefly SiO2)

Amazonite

KAlSi3O8 (Potassium Feldspar, variety of Microcline)

Red Jasper (River-worn)

Silicon Dioxide (SiO2) with Hematite inclusions

Chert (Yellow or Tan Chert)

Silicon Dioxide (SiO2)

Graphic Granite

Graphic Granite (variety of Pegmatite)

Pyrite

Iron Sulfide (FeS2)

Chert

Chert (Microcrystalline Quartz, SiO2)

Quartzite

Quartzite (SiO2)

Ferruginous Quartz

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Yellow Aventurine

Silicon Dioxide (Quartz with inclusions), SiO2

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.

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Ruby and Diamond Heart Pendant

Corundum (Al2O3) and Diamond (C)

Amazonite

Potassium Feldspar (KAlSi3O8)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Jasper)

Microcrystalline Quartz (SiO2)