Anthropogenic (Man Made)

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)

Mica-rich schist

Muscovite–biotite schist, commonly quartz-bearing

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)

Rhodonite

Rhodonite (MnSiO3)

Lazulite

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

Scoria

Scoria (a vesicular basalt or andesite)

Green Banded Chert (Agate/Jasper)

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

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

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

Calcite

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

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.

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

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)

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

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

Rose Quartz Carving

Quartum roseum (Variety of Quartz, SiO2)

Rose Quartz (likely carved)

Rose Quartz (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (often called Flint)

Chert (Cryptocrystalline 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)

Chert / Flint

Silicon Dioxide (SiO2)

Pink Granite

Phaneritic Igneous Rock (Quartz-Feldspar-Mica)

Serpentinite

Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)

Goldstone

Not a natural mineral or rock. It is an ornamental glass.

Seraphinite

Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.

Quartzite or Quartz Vein Material

SiO2

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Granite fragment

Granite