Organic (If Resin) Or Synthetic (If Glass); Simulating Sedimentary Or Metamorphic (For Natural Stones)

Ironstone Concretion

Ironstone (Siderite/Goethite/Hematite matrix)

Turquoise-style beaded bracelet

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly dyed or composite beads

Amber cabochon pendant

Amber (fossilized plant resin), chiefly polymerized diterpenoid resin

Black faceted gemstone, likely spinel or black tourmaline

Most plausibly black spinel (MgAl₂O₄); visually similar possibilities include schorl tourmaline (NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) or synthetic glass

Chert (specifically Flint or Jasper variant)

Microcrystalline quartz (SiO2)

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic zirconium dioxide, ZrO₂); possibly colorless quartz or laboratory diamond

Tumbled Yellow Quartz (Golden Quartz / Citrine)

Silicon Dioxide (SiO2)

Shale with Vein Infillings

Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.

Amber

Succinite

Sandstone

Arenite (Clastic Sedimentary Rock)

Green Aventurine

Quartzite (variety Aventurine) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)

River Stone (Limestone)

Sedimentary Calcium Carbonate (CaCO3)

Red aventurine

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 with K(Al,Cr)2AlSi3O10(OH)2)

Citrine Quartz

Silicon Dioxide (SiO2) with trace Iron impurities

Amber

Succinite (Fossilized Tree Resin), C10H16O

Banded Chert

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Polished pink quartz cabochon

Quartz (SiO₂), likely rose quartz or included quartz

Ironstone Concretion / Limonite Node

Goethite and Limonite (FeO(OH) nH2O)

Mixed polished river stones

Likely quartz, quartzite, chert/jasper, and possibly limestone or marble

Vuggy Limestone

Carbonate Sedimentary Rock with Vuggy Porosity (CaCO3)

Quartz Pebble (River Agate / Chalcedony)

Silicon Dioxide (SiO2)

Amber

Succinite (Resinite)

Tumbled chalcedony (likely milky quartz)

Microcrystalline quartz, SiO₂; possibly pale agate or quartzite

Chert Concretion (Flint)

Silicon Dioxide (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Amber (Copal)

Organic gemstone, fossilized tree resin (often immature amber or copal)

Graphite

Graphite (Carbon, C)

Adventurine (Green)

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Quartzite Beach Pebble

Quartzite (primarily SiO2)

Red jasper / red chert

Microcrystalline quartz (chalcedony), SiO₂, colored chiefly by iron oxides

Green Aventurine

Quartzite (Silicon Dioxide, SiO2 + Fuchsite)

Likely amber-colored chert or chalcedony fragment

Microcrystalline quartz (SiO₂), possibly iron-stained chert; exact identification is uncertain from the image

Citrine

Silicon Dioxide (SiO2)

Sandstone

Arenite

Waterworn Pebble / Quartzite

Metamorphic/Sedimentary rock fragment

Chert

Cryptocrystalline Quartz (SiO2)

Magnetic Hematite (Man-made)

Iron Oxide (Fe2O3) with Barium-Strontium Ferrite

Opal ring

Precious opal, hydrated amorphous silica (SiO₂·nH₂O), set in a metal ring

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Mixed Quartz and River Pebbles (Stone Collection)

Mixed assortment containing mainly Silicon Dioxide (SiO2)