Dalmatian Stone

Dalmatian Stone (a fine-grained igneous rock, often misidentified as Dalmatian Jasper)

igneous

Grey Chalcedony (Agate)

Silicon Dioxide (SiO2)

mineral

Sandstone (Ferruginous)

Arenite with Iron Oxide matrix

sedimentary

Vesicular Basalt with Quartz/Chalcedony

Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)

igneous

Granite

Granite (Felsic Plutonic Rock)

igneous

Granite fragment

Phaneritic Igneous Rock (Granitic composition)

igneous

Chert (Flint variety)

Chert (SiO2)

sedimentary

Chert (often called Flint)

Chert (Microcrystalline Silicon Dioxide, SiO2)

sedimentary

Quartzite with Hematite staining

Quartzite (SiO2) with iron oxide inclusions

metamorphic

Ferruginous Quartzite (Red Quartz)

Quartzite (SiO2 with Hematite/Iron impurities)

metamorphic

Sandstone (Ferruginous)

Arenite (variable SiO2 with Fe2O3 staining)

sedimentary

Chert (specifically Flint)

Microcrystalline quartz (SiO2)

sedimentary

Quartz Vein with Iron Staining

Silicon Dioxide (SiO2) with limonite/hematite staining

mineral

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

sedimentary

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Moonstone (specifically Rainbow Moonstone / White Labradorite)

White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)

mineral

Quartz Vein (Iron-stained)

Silicon Dioxide (SiO2) with limonite/hematite staining

mineral

Olivine (Peridot)

Olivine Group (Mg,Fe)2SiO4

mineral

Lepidolite

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

mineral

Pink Quartz

Silicon Dioxide (SiO2)

mineral

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock)

igneous

Ruby

Corundum (Al2O3 with Chromium impurities)

mineral

Amethyst

Silicon Dioxide (SiO2) containing Iron impurities

mineral

Himalayan Pink Salt

Halite (NaCl)

sedimentary

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

mineral

Anthracite Coal

Anthracite

metamorphic

River Pebble Gravel

Hydrothermally modified Clastic Sediment (mainly Quartzite and Chert)

sedimentary

Anthracite Coal

Anthracite

metamorphic

Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')

Calcite (Calcium Carbonate, CaCO3)

sedimentary

K2 Jasper (K2 Granite)

Azurite in Granite (Al2Cu3(CO3)2(OH)2 in NaAlSi3O8)

igneous

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxides

mineral

Folded Schist / Gneiss (Metamorphic Rock)

Regional Metaphoric Folded Outcrop (predominantly Schist/Gneiss)

metamorphic

Rhodonite

Rhodonite (Manganese silicate, (Mn,Fe,Mg,Ca)SiO3)

mineral

Meteorite (Chondrite)

L6 Ordinary Chondrite

igneous

Ocean Jasper

Orbicular Jasper (varietal of SiO2 with impurities)

mineral

Hematite

Iron(III) oxide (Fe2O3)

mineral

Obsidian

Volcanic Glass (SiO2 dominant)

igneous

Turquoise

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

mineral

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

sedimentary

Turritella Agate (Calligrapher Stone)

Silicified Elimia tenera (Chalcedony/Quartz)

sedimentary

Shungite

Non-crystalline carbon (Fullerenes / Carbon-60)

metamorphic