Mineral (Pseudomorph)

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Red Sandstone

Arenite (Ferruginous Sandstone)

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Sandstone with Iron Staining

Arenite with Limonite/Hematite inclusions (SiO2 + Fe2O3/FeO(OH))

Breciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Rose Quartz Chips

Quartz (Silicon Dioxide - SiO2)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Yellow Calcite

Calcium Carbonate (CaCO3)

Veined Basalt River Stone

Basalt with Calcite or Quartz veining

Obsidian

Volcanic Glass (SiO2 rich)

Dalmatian Stone

Peralkaline Feldsphathic Igneous Rock

Geode (Unopened)

Silica-rich Concretion (primarily SiO2)

Moqui Marble (Concretion)

Iron Oxide Concretion (Hematite/Goethite)

Sandstone

Arenite (primarily SiO2)

Azurite and Malachite

Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2(CO3)(OH)2)

Ironstone Concretion (Iron-rich Mudstone)

Siderite / Geothite concretion (FeCO3 / FeO(OH))

Basalt with Quartz Vein

Basalt (SiO2 vein inclusion)

Gossan (Iron Cap)

Limonitic Gossan (FeO(OH)·nH2O)

N/A - Non-Geological Item

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Polished orbicular granite (likely larvikite or orbicular diorite)

Quartz/feldspar-bearing granitoid with dark amphibole–biotite minerals; exact variety requires testing

Quartz Vein in Greenstone

Hydrothermal Quartz (SiO2) with Chlorite/Epidote Schist host rock

Quartz Geode with Calcite

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)

Sandstone Pebbles

Arenite (primarily SiO2 with mineral cement)

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Granite

Felsic intrusive igneous rock

Granite

Felsic intrusive igneous rock

Garnet in Schist (Mica Schist with Garnet Inclusion)

Garnetiferous Mica Schist (X3Al2(SiO4)3)

Brecciated Jasper

Silicon Dioxide (SiO2) with mineral impurities

Sedimentary Rock (Limestone or Siltstone pebble)

Sedimentary rock fragment

Kidney Stone

Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)

Quartz Geode

Crystalline Silicon Dioxide (SiO2) within a nodule

Healer's Gold (Iron-Stained Quartz Cluster)

Silicon Dioxide with Iron Oxide Coating (SiO2)

Geode

Quartz / Chalcedony nodule

Quartz (Chalcedony/Agate nodule)

Silicon dioxide (SiO2)

Chalcedony with Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Purple Chalcedony

Silicon Dioxide (SiO2)

Peach Quartz

Silicon Dioxide (SiO2)

Amethyst Cluster

Silicon Dioxide (Quartz variety: Amethyst) - SiO2