Sedimentary (Silica Rich Mineral Variety)

Chert (Jasper/Chalcedony)

Microcrystalline Quartz (SiO2)

Jasper (Imperial Jasper style)

Silicon Dioxide (SiO2) with impurities

Petrified Wood

Silicified Wood (SiO2)

Quartz Pebble (Milky Quartz)

Silicon Dioxide (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Agate (specifically Botswana or Banded Agate variety)

Chalcedony (Silicon Dioxide, SiO2)

Green Fluorite

Calcium Fluoride (CaF2)

Chert / Jasper / Agate (Chalcedony Group)

Microcrystalline Quartz (SiO2)

Agate Geode Node

Cryptocrystalline Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Agate (specifically Sardonyx or Black Agate variety)

Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz

Milky Quartz

Silicon Dioxide (SiO2)

Turquoise (Rough Specimens)

Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O

Picture Jasper

Silicified sedimentary or volcanic rock (primarily SiO2)

Chert (variations include Flint/Chalcedony)

Chert (SiO2 - Silicon Dioxide)

Chert (varietal: Jasper or Ironstone nodule)

Microcrystalline Quartz (SiO2) with iron oxides

Ferruginous Quartz

Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions

Blue Calcite

Calcite (Calcium Carbonate, CaCO3)

Milky Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

Quartz (Milky or Cloudy variety)

Silicon Dioxide (SiO2)

Jasper

Jasper (Silicon Dioxide, SiO2)

Pink Thulite (in Pumice-like texture)

Pink Zoisite (Mn-bearing Zoisite), Ca2Al3(SiO4)3(OH)

Milky Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Titanium Quartz (Rough)

Titanium-included Silicon Dioxide (SiO2 + Ti)

Chert (Jasper/Mudstone)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (Fe-rich)

Milky Quartz

Silicon Dioxide (SiO2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Agate

Silicon dioxide (SiO2)

Banded Agate (variety of Chalcedony)

Agate (SiO2)

Satin Spar (Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Rose Quartz

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

Chert / Flint

Chert (SiO2)

Ferruginous Quartzite (Chert)

Quartzite with Iron inclusions (SiO2 + Fe2O3)

Sandstone (Ferruginous)

Arenite (Fe-rich)

Jasper (Green/Yellow Moss Jasper)

Silicon Dioxide (SiO2)

Fulgurite

Fulgurite (Lechatelierite-rich variety)

Chert

Chert (SiO2)