Antropogenic (Man Made)

Diamond

Carbon (C)

Vesicular basalt (likely weathered lava rock)

Vesicular basalt; primarily plagioclase feldspar, pyroxene, and volcanic glass, with possible iron-oxide alteration

Pyrite

Iron Disulfide (FeS2)

Rough Diamond

Diamond (Pure Carbon: C)

Quartzite

Quartzite (SiO2)

Diamond ring

Diamond, crystalline carbon (C)

Diamond

Carbon (C)

Diamond

Carbon (C)

Diamond

Diamond (pure Carbon, C)

Lapis lazuli and green-blue chalcedony jewelry

Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)

Pink calcite (likely)

Calcite — calcium carbonate, CaCO₃

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Chert (or Flint)

Chert (cryptocrystalline quartz), SiO2

Diamond

Carbon (C)

Diamond

Carbon (C)

Coal (Anthracite / Bituminous)

Organic Sedimentary Rock (Carbon-based)

Chert / Green Jasper

Silicon Dioxide (SiO2)

Mica schist (possibly garnet–mica schist)

Muscovite–biotite schist; chiefly quartz, feldspar, muscovite, and biotite

Mica-rich schist

Muscovite–biotite schist, commonly quartz-bearing

Green Banded Chert (Agate/Jasper)

Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite

Scoria

Scoria (a vesicular basalt or andesite)

Rhodonite

Rhodonite (MnSiO3)

Lazulite

Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2

Native Silver

Silver (Ag)

Gemstone bead necklace (likely citrine or yellow quartz)

Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them

Sandstone (likely Fossilized Wood or Concrete Simulacrum)

Arenite / Silicified Wood / Anthropogenic Concrete

Polished black stone egg, probably black obsidian

Obsidian, a natural volcanic glass; composition primarily silica-rich glass (approximately SiO₂), with variable iron and other trace elements

Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)

Calcite

Chert

Silicon dioxide (SiO2)

Granite

Granite

Mother of Pearl (Nacre)

Calcium Carbonate (primarily aragonite, with conchiolin)

Marble

Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Obsidian

Obsidian (volcanic glass, amorphous silica rich rock)

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Stainless Steel Spoon

Iron-Chromium Alloy (Fe + Cr + Ni)

Tumbled sodalite with white calcite veining

Sodalite, Na8(Al6Si6O24)Cl2, commonly intergrown with calcite, CaCO3

Granite fragment

Granite

Weathered, iron-stained rhyolite pebble (possibly rhyolitic volcanic breccia)

Rhyolite, a felsic volcanic rock; mainly quartz and alkali feldspar with minor plagioclase, altered mafic minerals, and iron-oxide staining

Rose Quartz Carving

Quartum roseum (Variety of Quartz, SiO2)

Rose Quartz (likely carved)

Rose Quartz (SiO2)

Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)

N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)