Rose Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
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Polished gray-green stone, possibly labradorite
Labradorite, a plagioclase feldspar: (Ca,Na)(Al,Si)₄O₈
mineral
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
sedimentary
Likely fluorite fragments
Fluorite (calcium fluoride, CaF₂)
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Amazonite
Microcline (KAlSi3O8) with trace lead (Pb)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Likely brown chert (flint)
Microcrystalline quartz (SiO₂), variety chert/flint
sedimentary
Carnelian
SiO2 (Silicon Dioxide) - Translucent Chalcedony
mineral
Yellow Aventurine
Silicon Dioxide (SiO2) with inclusion of Mica
Mineral (Variety of Quartz)
Carnelian Agate
Silicon Dioxide (SiO2)
mineral
Carnelian (Red Agate)
Carnelian (SiO2 with Hematite inclusions)
mineral
Iron-rich weathered rock, possibly limonite/goethite-bearing ore
Limonite (hydrated iron oxides; chiefly goethite, FeO(OH), with hematite and other oxides possible)
mineral
Quartz geode (likely druzy quartz in chalcedony)
Quartz, silicon dioxide (SiO₂), commonly with microcrystalline chalcedony
mineral
Tumbled green aventurine (probable)
Quartzite dominated by quartz (SiO₂), with green fuchsite mica inclusions
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Carnelian
Carnelian (Cryptocrystalline Quartz, SiO2)
mineral
Tourmaline
Schorl (Complex boron silicate, NaFe3Al6(Si6O18)(BO3)3(OH)4)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Plume Agate or Moss Agate
Silicon dioxide (SiO2)
Mineral
Limonite (Iron-rich Siltstone / Sandstone base)
Hydrous ferric oxide mixture (FeO(OH)·nH2O)
sedimentary
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
metamorphic
Limonite/Goethite on Shale
Hydrous ferric oxides (FeO(OH)·nH2O) often associated with argillaceous rock
sedimentary
Tumbled yellow-green serpentine (probable)
Serpentine-group minerals, chiefly antigorite/lizardite; commonly Mg₃Si₂O₅(OH)₄
metamorphic
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
sedimentary
Dragon Vein Agate (Dyed)
SiO2
mineral
Epidosite
Epidosite (predominantly Epidote {Ca2Al2Fe3+Si3O12(OH)} and Quartz {SiO2})
metamorphic
Granite
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
igneous
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled labradorite
Labradorite, a plagioclase feldspar: approximately (Ca,Na)(Al,Si)₄O₈
mineral
Green aventurine
Quartzite dominated by quartz (SiO₂), commonly containing fuchsite mica or other inclusions
mineral
Fluorite (Fluor-spar)
Calcium Fluoride (CaF2)
mineral
Limonite / Brown Iron Ore
Hydrous Iron Oxide (FeO(OH)·nH2O)
mineral
Vesicular Basalt with Lichen
Vesicular Basalt
igneous
Fossil bivalve shell
Ribbed pectinid or related bivalve; originally calcite/aragonite (CaCO₃), likely partially mineralized
fossil
Obsidian
Volcanic Glass
igneous
Polished brecciated jasper pendant
Silica-rich jasper (microcrystalline quartz, SiO₂), brecciated and cemented by silica or iron-rich material
sedimentary
Carnelian
Carnelian (Cryptocrystalline Quartz, SiO2)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide
mineral
Amethyst
Silicon dioxide (SiO2)
mineral