Sedimentary Or Igneous Associated Mineral

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Red Jasper

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Jasper

Microcrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Jasper

Silicon dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Ferruginous Sandstone (Ironstone)

Sedimentary rock with high iron oxide content (Fe2O3 / FeO(OH))

Jasper

Jasper (Silicon Dioxide, SiO2)

Quartz Crystal

Silicon Dioxide (SiO2)

Polished orbicular stone, likely granite or diorite

Granite–diorite, composed mainly of feldspar, quartz, and dark amphibole/biotite

Chert or flint

Microcrystalline quartz (SiO₂), likely chalcedony-rich chert

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Chert (Pebble)

Microcrystalline to Cryptocrystalline Quartz (SiO2)

Chert (Red Jasper)

Silicon Dioxide (SiO2)

Porphyry

Porphyritic Igneous Rock

Quartz pebble

SiO2

White Quartz

Silicon Dioxide (SiO2)

Chert (Nodule fragment)

Silicon Dioxide (SiO2)

Chert (specifically Flint or Nodular Chert)

Silicon Dioxide (SiO2)

Pyrite (Tumbled)

Iron Disulfide (FeS2)

Pyrite in Matrix

Iron Sulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Gneiss

Gneiss (High-grade metamorphic rock)

Pyrite (Fool's Gold) Cube

Iron Sulfide (FeS2)

Rhodonite

Inosilicate (Manganese Iron Magnesium Calcium Silicate, (Mn,Fe,Mg,Ca)SiO3)

Black Tourmaline

Schorl (NaFe3Al6(Si6O18)(BO3)3(OH,F)4)

Rose Quartz

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

Blue Calcite

Calcium Carbonate (CaCO3)

Charoite

Charoite (Hydrated potassium, sodium, calcium, barium, strontium silicate hydroxide fluoride)

Dalmatian Stone

Peralkaline rhyolite with arfvedsonite (formerly incorrectly called Dalmatian Jasper)

Assorted Tumbled Gemstones

Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)

Tumbled Mixed Gemstones and Rocks

Various mineral species including quartz (SiO2) and silicate minerals

Fuchsite (Chrome Mica)

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

Quartz

Silicon Dioxide (SiO2)

Staurolite

Staurolite (Fe2Al9O6(SiO4)4(O,OH)2)

Pyrite

Iron Pyrite (FeS2)

Pyrite

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Magnetite (Iron Ore)

Magnetite (Fe3O4)