Mixed (Predominantly Sedimentary And Igneous)

Green Spot Jasper (Kiwi Jasper / Sesame Jasper)

Partially altered granitic rock rich in quartz, microcline feldspar, and tourmaline or amphibole inclusions

Chert (Flint)

Chert (SiO2)

Chert (specifically Jasper/Flint)

Microcrystalline Quartz (SiO2)

Amethyst (Ametrine or Bicolor Quartz variant)

Silicon Dioxide (SiO2) with iron impurities

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Chrysocolla

Hydrated copper silicate, (Cu,Al)2H2Si2O5(OH)4·nH2O

Unakite

Unakite Epidosite (composite of Epidote, Orthoclase, and Quartz)

Quartz-veined Sandstone Pebble

Quartzose Sandstone with Quartz Veinlets

Moss Agate

Silicon Dioxide with inclusions (SiO2 + Mn/Fe/Chlorite)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (mica)

Turquoise

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

Pink Granite

Phaneritic Plutonic Felsic Rock (Granite)

Granite

Granite (Phaneritic Quartz-Feldspar Felsic Rock)

Sandstone (River Cobble / Pebble)

Sedimentary Rock (Quartz Sandstone / Arenite)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)

Tumbled dark green stone, likely greenstone/serpentinite

Serpentinite (serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄), possibly chlorite-rich greenstone

Tumbled jasper (likely brecciated or mahogany jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions

Fuchsite

Chromium-bearing Muscovite [K(Al,Cr)2(AlSi3O10)(OH)2]

Gold and Silver (Metal Components of an Antique Pocket Watch)

Native Gold (Au) and Native Silver (Ag)

Labradorite

Feldspar (Plagioclase Series), (Ca,Na)(Al,Si)4O8

Sandstone

Sedimentary Rock (Quartz Arenite)

Quartzite Pebble (River Rock)

Metamorphic Quartzite (predominantly SiO2)

Tumbled green jasper (probable serpentine-rich stone)

Jasper, microcrystalline quartz (SiO₂), possibly mixed with serpentine or chlorite

Green Onyx (Carved Mushroom)

Calcite / Banded Calcite (often commercially sold as 'Mexican Onyx')

Brecciated Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Sandstone

Arenite

Silver (Sterling Silver Jewelry)

Argentum (Ag) mixed with Copper (Cu)

Bloodstone

Heliotrope (a variety of Cryptocrystalline Quartz / Jasper, SiO2)

Granitic Pegmatite with Graphic Texture

Graphic Granite (alkali feldspar and quartz intergrowth)

Granite Pebble

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Moss Agate

Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxides

Kambaba Jasper

Stromatolite Jasper (Microcrystalline Quartz with Fossilized Cyanobacteria)

Limonite (Iron Ore/Sandstone mixture)

Limonite (FeO(OH)·nH2O) often mixed with Goethite and sedimentary matrix

Sandstone

Arenite (Clastic Sedimentary Rock)

Weathered limestone pebble

Limestone; predominantly calcite (CaCO₃)

Weathered limestone fragment

Limestone, predominantly calcite (CaCO₃)

Rounded limestone pebble

Limestone, predominantly calcite (CaCO₃)

Pale limestone

Limestone, predominantly calcite (CaCO₃)

Limestone (Cliff Formation)

Limestone (predominantly CaCO3 as calcite)

Red Sandstone

Arenite (predominantly SiO2 with Fe2O3)

Magnetite sand (black iron-oxide sand)

Magnetite, Fe₃O₄; commonly mixed with ilmenite and other heavy minerals

Pegmatite

Igneous Pegmatite (Granitic Composition)