Sedimentary And Igneous (Mixed)

Polished blue-gray mineral specimen, likely galena-bearing ore

Galena (PbS), possibly mixed with quartz/calcite and secondary copper minerals

Yellow chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (tentative; possibly iron-stained chalcedony)

Black Tourmaline (Schorl)

NaFe3Al6(BO3)3Si6O18(OH)4

Clear 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)

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Tumbled hematite-rich ironstone

Hematite (Fe₂O₃), likely mixed with magnetite and iron-bearing silicates

Likely hematite-rich iron ore

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

Zoisite with Rubellite (Ruby in Zoisite)

Zoisite with inclusions of Hornblende (Anyolite)

Fossiliferous Limestone (Chert/Clay mixed)

Calcium Carbonate (CaCO3) / Silicon Dioxide (SiO2)

Botryoidal hematite (speculative)

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

Porphyritic Igneous Rock / Porphyry

Porphyry (Plagioclase/Quartz phenocrysts in a finer-grained groundmass)

Polished hematite-rich ironstone

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

Rough Gemstone Grains (Mixed Sapphires and Quartz)

Corundum (Al2O3) and Quartz (SiO2)

Polished brown jasper or brecciated jasper

Microcrystalline quartz (SiO₂), commonly mixed with iron oxides and other silicates

Tumbled iron-rich stone, likely hematite-bearing rock

Hematite (Fe₂O₃), possibly mixed with magnetite/goethite and host rock

Tumbled red jasper and related pebbles

Jasper, a microcrystalline variety of quartz (SiO₂), commonly containing hematite/goethite and other iron oxides

Jasper (brecciated or orbicular jasper)

Microcrystalline quartz (SiO₂), commonly mixed with hematite, goethite, chlorite, and other silicates

Concrete Fragment

Hardened Portland Cement Composite

Weathered quartz-bearing rock, possibly calcite vein fragment

Indeterminate; likely quartz (SiO₂) with carbonate minerals such as calcite (CaCO₃)

Quartz (Milky / Massive Quartz)

Silicon Dioxide (SiO2)

Jasper

Microcrystalline Quartz (SiO2)

Black Tourmaline

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

River Cobbles (Basalt, Quartzite, and Sandstone mix)

Fluvial detritus (primarily SiO2, Plagioclase, and Pyroxene mix)

Tumbled pink-and-white quartz

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

Zoisite with Ruby (Anyolite)

Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)

Fluorite Bracelet (light green beads) and possibly Lavender Jadeite (purple bead)

Fluorite: CaF₂ (Calcium Fluoride); Jadeite: NaAlSi₂O₆ (Sodium Aluminum Silicate)

Tumbled Mineral Collection (Amethyst, Celestite, K2 Jasper, Rose Quartz, Ruby in Zoisite, Que Sera Stone)

Mixed Mineral Specimens (Quartz SiO2, Celestite SrSO4, Corundum Al2O3 with Zoisite, etc.)

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

Silicon Dioxide (SiO2)

Bloodstone (Heliotrope)

SiO2 (Cryptocrystalline Quartz / Chalcedony)

Red-brown iron-rich mineral specimen, likely hematite/goethite

Hematite (Fe₂O₃), possibly mixed with goethite (FeO(OH)) and iron oxides

Quartz-rich rock, possibly milky quartz or quartzite fragment

Quartz (SiO₂), potentially quartzite if metamorphic

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

Quartz

Silicon Dioxide (SiO2)

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Polished/tumbled brecciated jasper (likely rainforest or ocean jasper)

Microcrystalline quartz (SiO₂), commonly mixed with chalcedony, iron oxides, and other silicates

Amazonite-like microcline bead bracelet

Microcline feldspar, KAlSi₃O₈; likely mixed with pale amazonite, quartz, or other feldspar beads

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Mixed Agate and Lapis Lazuli Bracelet

Chalcedony (SiO2) and Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Quartz (in matrix)

Quartz (SiO₂)

Quartz geode or quartz-bearing rock

Quartz (SiO₂), likely in a chalcedony- or basalt-hosted cavity