Man Made Material

Chert (specifically Flint or Common Chert node)

Silicon Dioxide (SiO2)

Banded Calcite or Travertine

Calcium Carbonate (CaCO3)

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)

Chalcedony (SiO₂)

Granite Cobble/Pebble

Granite

Chert (or Flint)

Chert (a cryptocrystalline variety of quartz, SiO2)

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Cullet Glass (Industrial Slag Glass)

Amorphous Silica (SiO2) with metallic oxide impurities

Ferrous Slag (Iron Smelting By-product)

Fused Siliceous Slag

Granite, possibly granodiorite

Coarse-grained felsic plutonic rock; chiefly quartz (SiO₂), potassium feldspar and plagioclase feldspar, with biotite and/or hornblende

Gemstone bead necklace (likely citrine or yellow quartz)

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

Marble

Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)

Chert (specifically Yellow/Brown Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Brecciated jasper (likely red-and-cream jasper)

Jasper, an opaque microcrystalline variety of quartz; primarily cryptocrystalline SiO₂ with iron-oxide staining and possible chalcedony/quartz veining

Chert (Flint variety)

Chert (Microcrystalline or Cryptocrystalline Quartz), SiO2

Basalt

Basalt

Pearl-embellished decorative cross

Pearl (biogenic calcium carbonate, predominantly aragonite) with rhinestone-mounted glass or synthetic gemstones

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.

Titanium Coated Aura Quartz (Apple Aura Quartz)

Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating

Tumbled sodalite with white calcite veining

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

Gold (Elemental Metal)

Gold (Au)

Quartz (Engineered Quartz Surface)

Silicon Dioxide (SiO2) based composite

Blue Sea Glass

Amorphous Silica (Anthropogenic glass)

Chert / Flint

Chert (varieties include Flint)

Sea Glass

Amorphous Silica (Glass) SiO2

Synthetic Costume Accessory (Non-Geological)

Polyester and Acrylic Fiber (Anthropogenic polymer)

Sea Glass (Cobalt Blue)

Amorphous Silica (Glass with Cobalt additives)

Blue Goldstone

Aventurine Glass (Silicon Dioxide infused with Cobalt/Copper)

Blue Slag Glass

Ferro-silicate glass (Slag)

Cullet Glass (Strawberry Glass)

Amorphous Silicon Dioxide (SiO2) with metallic dopants

Chert Pebble/Nodule

Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)

Chalk

CaCO3 (primarily Calcium Carbonate), biogenic sedimentary rock

Beaded Jewelry (Assorted Gemstones)

Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ

Fossiliferous Limestone

Limestone (composed primarily of calcite with included fossils CaCO3)

Chert

Chert (microcrystalline quartz)

Polished white chalcedony or milky quartz pebble

Chalcedony, microcrystalline quartz (SiO₂), possibly with iron-oxide staining or a minor mineral inclusion

Obsidian

Obsidian (volcanic glass, amorphous silica rich rock)

Obsidian

Obsidian (volcanic glass)

Mixed Gemstone Beaded Jewelry

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

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 (variant of Flint)

Chert (SiO2)

Rose Quartz Carving

Quartum roseum (Variety of Quartz, SiO2)