Man Made Composite (Lithified Equivalent Of Sedimentary)

Opalite Egg

Synthetic Glass (Simulated Opal)

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment

Opalite

Opalescent Glass (SiO2 + coloring agents)

Blue Goldstone

Man-made glass with cobalt and metal flecks

White pebble, likely quartz or calcite

Indeterminate from image; possible microcrystalline quartz (SiO₂) or calcite (CaCO₃)

Polished blue glassy mineral specimen, likely sodalite or blue aventurine

Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph

Cubic Zirconia (Jewelry Setting)

Zirconium Dioxide (ZrO2)

Diamond

Native Carbon (C)

Blue Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Blue glassy gemstone-like specimen

Indeterminate; possibly dyed or treated turquoise, blue apatite, or man-made glass

Decorative gemstone-chip jewelry (likely turquoise, coral, and assorted beads)

Predominantly turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; other pieces appear to be dyed coral or red stone, and possibly shell/metal components

Sea Glass

Amorphous silicon dioxide (man-made glass weathered by nature)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Blue Goldstone

Synthetic glass with cobalt and copper inclusions

Cubic Zirconia (Jewelry Setting)

Cubic Zirconia (ZrO2)

Aluminum Slag

Anthropogenic Aluminum (Al)

Dzi Bead (Etched Chalcedony)

Cryptocrystalline Quartz (SiO2) with chemical etching

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants

Dragon's Breath (Mexican Opal Glass)

Artisan Foil Glass (SiO2 based)

Hematite

Iron(III) oxide (Fe2O3)

Lava Rock with Fabric Impression

Scoria or Basalt with anthropogenic impressions

Fossilized crinoid columnal (likely)

Crinoidea; commonly preserved as calcite (CaCO₃)

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

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

Small rounded mineral pebble, possibly quartz

Uncertain; likely microcrystalline or crystalline SiO₂ (quartz), potentially with iron-oxide staining

Titanium Aura Quartz

Silicon Dioxide (SiO2) coated with Titanium and Niobium

Basalt

Basalt

Tumbled milky quartz

Quartz (SiO₂), cryptocrystalline-to-massive variety

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety

Slag

Anthropogenic Vitreous Silica/Iron oxides

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Tumbled milky quartz

Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH)2)

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Porcelain (White Ceramic)

Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)

Acrylic or Resin (Synthetic Imitation)

Polymethyl Methacrylate (PMMA) or Polyepoxide

Vesicular basalt (weathered scoria)

Scoriaceous basalt; chiefly plagioclase, clinopyroxene, olivine, and iron-titanium oxides

Red-orange jasper pebble (tentative)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Sea Glass

Man-made vitreous material (silica-based glass)

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)

Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)

Terrazzo (Synthetic Composite Rock)

Cementitious or Epoxy Resin-bound Aggregates