Man Made Material, Not A Natural Rock Or Mineral Specimen

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Concrete with Exposed Aggregate

Anthropogenic conglomerate (Concrete)

Opalite

Synthetic Opalized Glass

Exposed Aggregate Concrete (Pea Gravel)

Concrete with Siliceous Alluvial Gravels

Asphalt (Bituminous Pavement)

Bituminous mix (Aggregates with Bitumen binder)

Goldstone (brown goldstone)

Man-made aventurine glass, typically copper-bearing silica glass

Polished black pebble, likely basalt

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine

Cherry Quartz with Rose Quartz

Crystalline Quartz (SiO2) with glass-based synthetic components

Green sea glass (likely bottle glass)

Man-made soda-lime silicate glass; not a natural mineral

Carnelian (red-orange chalcedony) beads

Microcrystalline quartz, SiO₂; chalcedony colored chiefly by iron oxides

Cobalt Blue Glass / Cullet Glass

Silicon dioxide (Amorphous man-made glass)

Likely clear quartz pebble or glassy quartz fragment

Quartz (silicon dioxide, SiO₂)

Baked-clay ceramic fragment (likely brick or pottery)

Fired clay, primarily aluminosilicate minerals; not a natural rock

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Conglomerate

Conglomerate (clastic sedimentary rock)

Polymictic conglomerate or breccia (possibly concrete-like aggregate)

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

Opalite

Man-made Glass (SiO2 + additives)

Decorative mosaic cross containing mixed rock and glass fragments

Polychrome aggregate; likely quartz, feldspar, marble, granite, and assorted colored glass

ABS Plastic (Acrylonitrile Butadiene Styrene)

(C8H8)x·(C4H6)y·(C3H3N)z

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

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

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Byproduct)

Costume Jewelry with Synthetic Gemstones

Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)

Blue cabochon gemstone, likely synthetic glass or dyed stone

Indeterminate from image; possible glass, synthetic spinel, sodalite, or lapis lazuli

Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)

Silicon Dioxide (SiO2) with inclusions/dye

Concrete Rubble with Aggregate

Hardened Portland Cement Paste with Coarse Aggregate

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment

Clear quartz tumbled stone

Quartz (silicon dioxide, SiO₂)

Carborundum

Silicon Carbide (SiC)

Asphalt Concrete (Bituminous Pavement)

Aggregates in Bitumen Matrix

Polished black pebble, possibly obsidian

Volcanic glass (obsidian), likely; identification is tentative from the image

Crackle Agate / Dyed Quartz

SiO2 (Silicon Dioxide)

Ring with an Orange Inlay

N/A (Man-made object)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Opalite glass sphere (likely synthetic imitation)

Man-made opalescent glass; not natural opal

Opalite

Opalescent Glass (SiO2 + coloring agents)

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Asphalt Chunk (Bituminous Concrete)

Aggregated Bitumen / Artificial Breccia

Gemstone-set ring, likely cubic zirconia or diamond

Likely synthetic cubic zirconia (zirconium dioxide, ZrO₂); stones may alternatively be diamond (carbon, C)

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant