Mixed: Igneous And Sedimentary

Concrete Fragment

Hardened Portland Cement Composite

Chalcedony

Chalcedony (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with Iron Oxide / Chlorite inclusions

Magnetite sand (black iron-oxide sand)

Magnetite, Fe₃O₄; commonly mixed with ilmenite and other heavy minerals

Red Agate

Chalcedony (SiO2)

Auriferous Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Yellow Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)

Tumbled green jasper (probable serpentine-rich stone)

Jasper, microcrystalline quartz (SiO₂), possibly mixed with serpentine or chlorite

Pyrite-bearing sulfide ore (likely pyrite with iron oxides)

Pyrite, FeS₂, possibly mixed with limonite/goethite and other sulfides

Quartz crystal fragment

Quartz (silicon dioxide, SiO₂)

Tumbled feldspar-rich stone (likely granite or pegmatite fragment)

Potassium feldspar, chiefly orthoclase or microcline (KAlSi₃O₈), possibly mixed with quartz

Rhyolitic Tuff (Breccia Type)

Rhyolitic Pyroclastic Rock (Mixed Silicates including Quartz, Feldspar, and Volcanic Glass)

Quartz (Citrine or Iron-Stained variety)

Silicon Dioxide (SiO2)

Chalcedony (Common Agate)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Quartz (clear quartz/crystal quartz)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Agate

Silicon Dioxide (Chalcedony), SiO2

Rough Gemstone Grains (Mixed Sapphires and Quartz)

Corundum (Al2O3) and Quartz (SiO2)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Iron-rich sulfide ore, likely pyrite-bearing gossan

Pyrite (FeS₂), possibly mixed with iron oxides/hydroxides and other sulfides

Chalcedony (Dyed Agate and Citrine-style Quartz)

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Likely hematite-rich iron ore

Hematite, Fe₂O₃, possibly mixed with magnetite or other iron oxides

Specular Hematite

Hematite (Fe2O3)

Garnet-bearing granite or pegmatitic granitic rock

Coarse-grained granitoid, likely granite or pegmatite, composed mainly of quartz and feldspar with almandine/spessartine garnet and dark biotite or amphibole

Epidote with Magnetite/Hematite inclusions

Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides

Fossiliferous Limestone (Chert/Clay mixed)

Calcium Carbonate (CaCO3) / Silicon Dioxide (SiO2)

Polished hematite-rich ironstone

Hematite (Fe₂O₃), likely mixed with magnetite and iron-rich jasper

Chalcedony (Moonstone variant or White Agate)

Silicon Dioxide (SiO₂)

Pyrite

Iron Sulfide (FeS2)

Galena

Lead Sulfide (PbS)

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Botryoidal hematite (speculative)

Hematite, iron(III) oxide (Fe₂O₃), possibly mixed with goethite or magnetite

Milky Quartz (Druzy Geode fragment)

Silicon Dioxide (SiO2)

Probable magnetite-bearing rock

Magnetite (Fe₃O₄), possibly in a fine-grained host rock

Tumbled pink-and-white quartz

Quartz, silicon dioxide (SiO₂), likely rose quartz mixed with milky quartz

Quartz (in matrix)

Quartz (SiO₂)

Mixed Tumbled Stones (Mostly Agate, Jasper, and Quartz)

Silicon Dioxide (SiO2)