Beaded gemstone bracelet, likely amethyst and mixed polished stones
Amethyst: quartz (SiO₂); other beads appear to be assorted quartz/chalcedony or jasper
gemstone
Category
Mixed (Sedimentary, Igneous, And Metamorphic)
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Polished carnelian agate
Microcrystalline quartz (SiO₂), chalcedony with iron-oxide coloration
mineral
Quartz with Inclusions
Silicon Dioxide (SiO2)
mineral
Galena
Lead Sulfide (PbS)
mineral
Clear Quartz (Faceted Crystal)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Granite (Pink/Red Granite)
Phaneritic Felsic Igneous Rock
igneous
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
mineral
Conglomerate (Greenstone/Pebble Conglomerate)
Polymictic Conglomerate
sedimentary
Mixed Tumbled Stones (Mostly Agate, Jasper, and Quartz)
Silicon Dioxide (SiO2)
sedimentary and metamorphic minerals
Tumbled blue sodalite beads
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, likely with white albite or calcite veining
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Granodiorite
Granodiorite (phaneritic intrusive igneous rock)
igneous
Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Biotite Mica Schist
Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2
metamorphic
River Pebbles and Cobbles
Mixed Siliciclastic Sediments (Quartzite, Chert, and Sandstone clasts)
sedimentary
Banded Iron Formation (BIF) / Iron Ore
Hematite-Magnetite BIF (Fe2O3 / Fe3O4 mixed with SiO2)
sedimentary
Blue Apatite
Calcium Fluorophosphate - Ca5(PO4)3F
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Tumbled jasper or chalcedony pebble
Microcrystalline quartz (SiO₂), likely jasper/chalcedony with iron-oxide staining
mineral
Mixed polished/tumbled stones; likely blue calcite, red carnelian, and gray/blue quartz or agate
Probable calcite (CaCO₃), chalcedony/quartz (SiO₂), and iron-colored chalcedony
mineral
Rhodonite
Manganese inosilicate, (Mn,Fe,Mg,Ca)SiO3
mineral
Citrine
Silicon dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Ironstone Pebble
Ferruginous sedimentary rock (Fe2O3 / FeO(OH) mixed with SiO2)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Tumbled brown chalcedony or jasper
Microcrystalline quartz, SiO₂; likely iron-oxide-bearing chalcedony/jasper
mineral
Galena
Lead Sulfide (PbS)
mineral
Colorless faceted gemstone (likely cubic zirconia)
Cubic zirconia, zirconium dioxide (ZrO₂); possibly synthetic quartz or glass imitation
gemstone
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
mineral
Clear Quartz
Silicon dioxide (SiO2)
mineral
Milky Quartz
Silicon dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite in Quartz Matrix
Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Silver (Sterling Silver)
Argentum (Ag) mixed with Copper (Cu); Formula: Ag+Cu
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral