Anthropogenic Sedimentary (Man Made)

Polished gemstone tower assortment

Primarily quartz varieties and simulants; apparent amethyst (SiO₂), rose quartz (SiO₂), clear quartz (SiO₂), fluorite (CaF₂), sodalite, malachite, and possibly dyed or composite stones

Eroded Brick or Pumice-like Scoria

Vesicular Basalt / Scoria (Anthropogenic variant: Eroded Firebrick)

Opalite

Synthetic Opalized Glass

Opalite (Synthetic Moonstone/Opal)

Synthetic Silica Glass

Carved opalite pendant

Opalite (man-made opalescent glass; not a natural mineral)

Dyed Agate / Painted Stone

Silicon Dioxide (SiO2) with artificial pigment

Chert / Flint Handaxe

Cryptocrystalline Quartz (SiO2)

Quartz crystal (likely clear quartz)

Quartz, silicon dioxide (SiO₂)

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Blue Goldstone

Man-made glass with cobalt and metal flecks

Conglomerate

Conglomerate Rock (Paraconglomerate)

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Opalite

Man-made Glass (Synthetic Opalized Glass)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Iron-rich slag or ironstone; appearance is not diagnostic

Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag

Opalite Egg

Synthetic Glass (Simulated Opal)

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment

Opalite

Opalescent Glass (SiO2 + coloring agents)

Green sea glass (likely)

Anthropogenic glass, not a mineral; composition commonly soda–lime silicate glass

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Tumbled black stone, likely black obsidian

Obsidian (volcanic glass; chiefly silica-rich rhyolitic composition)

Tumbled gray stone, likely quartz-rich pebble

Probable microcrystalline quartz/chalcedony (SiO₂), possibly gray jasper or quartzite

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 glassy gemstone-like specimen

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

Hematite

Iron(III) oxide (Fe2O3)

Red glassy gemstone, possibly garnet

Unidentified red transparent material; garnet group (X₃Y₂(SiO₄)₃) is a possibility

Blue Goldstone

Synthetic glass with cobalt and copper inclusions

Cubic Zirconia (Jewelry Setting)

Cubic Zirconia (ZrO2)

Dzi Bead (Etched Chalcedony)

Cryptocrystalline Quartz (SiO2) with chemical etching

Dragon's Breath (Mexican Opal Glass)

Artisan Foil Glass (SiO2 based)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Sea Glass

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

Polished opalite (likely man-made opalescent glass)

Opalite is a commercial name, not a mineral; typically opalescent glass, often soda-lime silicate glass

Polymictic conglomerate or breccia (possibly concrete-like aggregate)

Lithified polymictic gravel; clasts may include basalt, granite, quartzite, and other silicates

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Dalmatian Stone

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

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

Sea Glass

Man-made vitreous material (silica-based glass)