Green Aventurine and Clear Quartz Bracelet
Quartz variety with Fuchsite inclusions (Aventurine) and pure Silicon Dioxide (SiO2)
gemstone
Category
Mineral_rock
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Kidney Stone
Calcium Oxalate (CaC2O4·nH2O)
mineral
Limonite with Ironstone
Limonite (hydrated iron(III) oxide-hydroxides), FeO(OH)·nH2O
mineral
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Copper Ore (with Malachite/Chrysocolla and Iron Oxides)
Secondary Copper Minerals (Cu2(CO3)(OH)2 / (Cu,Al)2H2Si2O5(OH)4·nH2O)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Limonite or Ironstone Nodule
Hydrated iron oxide-hydroxide (FeO(OH)·nH2O)
mineral
Lapis Lazuli
Lapis lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Lapis Lazuli (Tumbled Specimen)
Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
metamorphic
Turquoise
Hydrate phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Turquoise in Matrix
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Gneiss with Quartz Veining
Gneiss (High-grade metamorphic rock)
metamorphic
Gabbro (Water-Worn Pebble)
Gabbro (Plagioclase Feldspar and Pyroxene)
igneous
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
mineral
Rough Diamond (Bort)
Diamond (C)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Granite (Thin Section)
Granite (Felsic Plutonic Rock)
igneous
Gemstone Ring
Various (Likely Glass, Cubic Zirconia, or assorted semi-precious stones)
gemstone
Hematite
Hematite (Fe2O3)
mineral
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and silicate minerals
sedimentary
Chert with Calcite Veins
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) intrusions
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-oxide enriched)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Quartz-rich breccia or altered granite fragment
Polymineralic quartz–feldspar rock, likely hydrothermally altered granite/pegmatite
igneous
Sandstone
Arenite (SiO2 based)
sedimentary
Limonite (Ironstone)
Limonite (FeOO·nH2O)
mineral
Limonite (Ironstone)
Goethite/Limonite (Hydrated iron(III) oxide-hydroxide)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Gneiss
Gneiss
metamorphic
Calcite–fluorite mineral specimen with iron-oxide staining
Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Sandstone with Manganese Dendrites
Arenite (mostly SiO2) with Manganese Oxide inclusions (MnO2)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O)
mineral
Granodiorite
Granodiorite
igneous
Gneiss (foliated metamorphic rock)
Gneiss
metamorphic
Gneiss
High-grade Metamorphic Gneiss
metamorphic