Manufactured Stone

N/A - Man-made object (Jewelry Chain)

Antiqued or Oxidized Metal Chain (often Steel or Brass)

Quartz-rich rock fragment, likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly an iron-stained quartz vein fragment

Beige polished stone tile (likely limestone or marble)

Uncertain; probable calcite-rich limestone or marble (CaCO₃)

Goldstone (Brown/Gold variety)

Aventurine Glass (SiO2 with Copper inclusions)

Dark green faceted gemstone ring

Likely green tourmaline (dravite/elbaite) or green glass imitation; visual identification is inconclusive

Green-and-white terrazzo (likely serpentine/marble aggregate)

Composite decorative stone; probable serpentinite (Mg₃Si₂O₅(OH)₄) with white calcite marble fragments in cementitious matrix

Tumbled orange calcite (probable)

Calcite, calcium carbonate (CaCO₃)

Likely fine-grained granite or granitic stone surface

Granite (quartz–feldspar–mica rock); exact identification is uncertain from this close-up

Fossiliferous limestone

Bioclastic carbonate rock, chiefly calcite (CaCO₃), containing marine fossil fragments

Dark vesicular volcanic rock, likely basaltic scoria

Scoria (vesicular basalt; composition commonly plagioclase, pyroxene, and iron-rich glass)

Conglomeratic sandstone / breccia-like gravel rock

Polymictic conglomerate (possibly lithified gravel or concrete-like natural conglomerate)

Engineer Quartz/Quartzite

SiO2 (Silicon Dioxide with binders)

Oak-grain Laminate (Industrial/Decorative Furniture Finish)

Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)

Man-made Crystal (Lead Glass)

Lead oxide-doped Silica Glass (approx. SiO2 + PbO)

Opalite

Synthetic glass / Opalized glass

Clear faceted gemstone, likely cubic zirconia

Synthetic zirconium dioxide (ZrO₂), probably cubic zirconia; exact identification requires testing

Green aventurine pendant

Quartz variety, SiO₂, colored mainly by fuchsite or other chromium-bearing mica inclusions

Clear quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Likely polished black stone or obsidian

Obsidian (volcanic glass), chiefly SiO₂

Polished white marble tile

Calcite marble (predominantly CaCO₃)

Flint or chert fragment

Microcrystalline quartz (SiO₂), likely flint/chert

Possible tumbled obsidian

Volcanic glass, primarily rhyolitic silica glass (SiO₂-rich)

Pearl necklace

Pearl—biogenic calcium carbonate, primarily aragonite (CaCO₃)

Green iridescent glass cabochon or synthetic gemstone

Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone

Milky quartz pebble

Quartz (SiO₂), likely massive or microcrystalline quartz

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Fossil bone or tooth fragment

Mineralized fossil vertebrate bone/tooth; exact taxon cannot be determined from the photograph

Green glass cabochon or tumbled stone

Indeterminate; likely man-made glass, possibly aventurine glass rather than a natural mineral

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Polished black stone, likely black obsidian

Obsidian (volcanic glass; predominantly SiO₂)

Quartzite

Metamorphic Quartzite (SiO2)

Tumbled jasper (likely ocean/picture jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide inclusions

Opalite (Synthetic Opalized Glass)

Synthetic Silicon Dioxide (SiO2) glass

Likely ironstone concretion or weathered iron-rich rock

Goethite/hematite-bearing limonite (FeO(OH)·nH₂O / Fe₂O₃)

Light-gray weathered stone, likely limestone

Calcite-rich limestone (CaCO₃), possibly calcareous sandstone or concrete-like rock

Blue glass-like heart pendant, likely synthetic blue spinel or colored glass

Unconfirmed; possibly synthetic spinel (MgAl₂O₄) or cobalt-colored glass

Red faceted gemstone, likely synthetic ruby or red glass

Ruby: corundum, aluminum oxide (Al₂O₃), chromium-colored; identity cannot be confirmed visually

Green faceted gemstone, likely synthetic glass or peridot

Indeterminate from image; possible peridot (olivine, (Mg,Fe)₂SiO₄) or green synthetic glass

Build-A-Bear Plush (Non-Geological)

Polyester fibers (C10H8O4)n and Synthetic Polymers

Wood Paneling

Engineered Wood / Plywood Paneling

Opalite

Man-made Opalized Glass (Synthetic Glass)

Granite or granitic gneiss fragment

Granite: quartz + feldspar + mica; possibly weathered granitic gneiss