Mineral (Variety Of Quartz)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Quartz (possibly milky quartz or quartz with inclusions)

SiO2 (Silicon Dioxide)

Blue Chalcedony (likely dyed)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Granite

Phaneritic Felsic Igneous Rock (Granite)

Quartz (in matrix)

Quartz (SiO₂)

Sandstone

Quartz Sandstone (predominantly)

Jasper (likely river-worn)

Silicon Dioxide (SiO2)

Granite

Granite (Phaneritic intrusion / SiO2 + KAlSi3O8 + NaAlSi3O8)

Smoky Quartz

Silicon Dioxide (SiO2)

Chert (often called Flint)

Chert (Microcrystalline Quartz, SiO2)

Granite

Granite (composed primarily of Quartz, Feldspar, and Mica)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Carnelian

Carnelian (Silica/Quartz Variety), SiO2 with Fe2O3 impurities

Amethyst

SiO2 (Silicon Dioxide) - Purple variety of Crystalline Quartz

Amygdaloidal Basalt

Amygdaloidal Basalt (extrusive volcanic rock with secondary mineral infilling)

Banded Chert

Microcrystalline Quartz (SiO2)

Jasper

Jasper (Silicon Dioxide, SiO2)

River Jasper

Silicon Dioxide (SiO2) with impurities

Beryl (Emerald Variety)

Beryllium Aluminum Silicate (Be3Al2(SiO3)6)

Black Onyx

Silicon dioxide (SiO2) - Chalcedony variety

Honey Calcite

Calcium Carbonate (CaCO3)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Yellow Chalcedony or River Jasper

Silicon Dioxide (SiO2)

Eagle Eye Stone (Green Tiger's Eye)

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

Banded Agate

Silicon dioxide (SiO2) - variety of Chalcedony

Blue Lace Agate (Polished Point)

Silicon Dioxide (SiO2) - Variety of Chalcedony

Rose Quartz

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) - variety Jasper

Quartz (Rose or Milky variety fragment)

Silicon Dioxide (SiO2)

Chalcedony (Agate)

Silicon Dioxide (SiO2)

Mixed Tumbled Gemstones (Agate, Aventurine, Pyrite, etc.)

Multiple (principally Silicon Dioxide SiO2 and Iron Disulfide FeS2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Nodule fragment)

Silicon Dioxide (SiO2)

Red Jasper

Jasper (Silicon Dioxide with iron oxide inclusions), SiO2

Quartzite (River Cobble)

Quartzite (dominant mineral: Quatrz, SiO2)

Jasper

Jasper (SiO2)

Dyed Agate Slice

Silicon Dioxide (SiO2) with artificial colorants

Chert (Jasper)

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Quartz Geode

Silicon Dioxide (SiO2)

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

River Jasper (Chert/Chalcedony mix)

Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions