Sedimentary Like (Industrial Composite)

Native Copper with Malachite and Chrysocolla

Native Copper (Cu) with Malachite [Cu2CO3(OH)2] and Chrysocolla [(Cu,Al)2H2Si2O5(OH)4·nH2O]

Honey Calcite

Calcium Carbonate (CaCO3)

Sandstone

Arenite (primarily Quartz-rich)

Sapphire

Corundum (Al2O3)

Sandstone (Ferruginous)

Arenite (with Iron Oxide cement)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Flint

Chert (Silicon dioxide, SiO2)

Anthracite

Anthracite Coal

Milky Quartz with Mineral Inclusions

Silicon Dioxide (SiO2)

Rough Diamond (or Quartz Crystal)

Carbon (C) [if Diamond] / Silicon Dioxide (SiO2) [if Quartz]

Rough Diamond

Diamond (C)

Green Calcite

Calcium Carbonate (CaCO3)

Ruby

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Sandstone

Arenite (mostly Quartz-based)

Bismuth Crystal

Bismuth (Bi)

Pyrite-bearing schist (likely mica schist)

Muscovite–quartz schist with disseminated pyrite (FeS₂)

Yellow Jasper

Silicon dioxide (SiO2) with iron oxide impurities

Banded Agate

Agate (Silicon Dioxide, SiO2)

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)

Smoky Quartz

Smoky Quartz (SiO2 - Silicon Dioxide with trace impurities of aluminum)

Quartzite

Quartzite (SiO2)

Anthracite Coal

Anthracite

Quartz with Mica inclusions (Gold-colored Mica)

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (Phlogopite/Muscovite) inclusions

Green Quartzite (Aventurine-like)

Quartzite (primarily SiO2 with chromium-rich mica or chlorite inclusions)

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Schist (Chlorite or Mica-rich)

Chlorite Schist

Schist

Chlorite-Mica Schist

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Rounded river pebble

Indeterminate; likely quartz-rich sandstone, chert, or weathered volcanic rock

Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Sedimentary Pebble

Sedimentary Rock Fragment

Diamond (Colorless/White)

Carbon (C)

Satin Spar (Selenite)

Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)

Schorl (Black Tourmaline) in Quartz/Feldspar Matrix

NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)

Green Calcite

Calcium Carbonate (CaCO3)

Quartzite

Metamorphic rock primarily composed of Quartz (SiO2)

Stainless Steel (Polished)

Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)

Red Vanadinite on Matrix

Vanadinite (Pb5(VO4)3Cl)

Anthracite Coal

Anthracite (a form of coal, primarily carbon)

Ruby

Corundum (Al2O3 with Chromium traces)