Mineral (Man Made Glass)

Fluorite (Polished Point/Tower)

Calcium Fluoride (CaF2)

Likely blue-green glassy slag or a weathered mineral fragment

Unidentified; the image does not show diagnostic features sufficient for a mineral identification

Goldstone (likely red/brown aventurine glass)

Man-made aventurine glass; copper-bearing silicate glass (not a natural mineral)

Chert Concretion

Chert (Microcrystalline Quartz, SiO2)

Goldstone (brown goldstone)

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

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Titanium Aura Quartz

Titanium bonded Silicon Dioxide (SiO2 + Ti)

Sea Glass (specifically Frosted White)

Amorphous Silica (substance: Sodium-calcium silicate glass)

Asphalt Concrete (Bituminous Pavement)

Aggregates in Bitumen Matrix

Aluminum Slag

Anthropogenic Aluminum (Al)

Blue glassy fragment among beach gravel

Likely cobalt-blue man-made glass; not a natural mineral specimen

Tumbled milky chalcedony (likely common opalite-like quartz)

Chalcedony, microcrystalline SiO₂; possibly pale common opal, hydrated SiO₂·nH₂O

Goldstone (Brown/Gold)

Aventurine Glass (Man-made glass with Copper inclusions)

Goldstone

Aventurine Glass (Man-made glass with copper inclusions)

Aura Quartz (Titanium Quartz)

Titanium-coated Silicon Dioxide (SiO2 + Ti)

Blue glassy tumbled stone, likely blue chalcedony or slag glass

Chalcedony (microcrystalline SiO₂), possibly man-made blue glass

Quartz crystal (likely clear quartz)

Quartz, silicon dioxide (SiO₂)

Concrete with Aggregate

Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)

Polished dendritic agate or jasper

Microcrystalline quartz (SiO₂), likely chalcedony with iron/manganese dendrites

Opalite

Synthetic Opalized Glass

Green glassy mineral fragment, possibly fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

Aura Quartz

Titanium or Gold bonded Silicon Dioxide (SiO2)

Blue-dyed tumbled quartz or glass imitation

Quartz (SiO₂), appearance possibly enhanced with blue dye; identity uncertain from image

Small pebble, likely limestone

Unidentified carbonate pebble, possibly micritic limestone (calcite, CaCO₃)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Goldstone

Aventurine glass (Synthetic glass with copper inclusions)

Polished black pebble, likely basalt

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

Raw quartz crystal

Quartz (silicon dioxide, SiO₂), likely milky or included quartz

Aura Quartz (specifically Titanium Aura Quartz)

Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)

Purple glassy pebble, possibly slag glass

Unidentified; likely man-made glass rather than a natural mineral

Concretion (Sandstone)

Carbonate-cemented Sandstone Concretion

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Slag Glass

SiO2 (Silicon Dioxide) with impurities

Felsic Drill Core (likely Gneiss or Granite)

Felsic Metamorphic Rock (Gneissic profile)

Blue cabochon, likely dyed or synthetic material

Undetermined; possibly dyed chalcedony (SiO₂), glass, or synthetic corundum

Agate and millefiori glass jewelry

Agate: microcrystalline quartz (SiO₂); millefiori element appears to be man-made glass

Man-made Crystal (Lead Glass)

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

Concrete Fragment

Artificial Conglomerate (Cement and Aggregate)

Cubic Zirconia (Jewelry Setting)

Zirconium Dioxide (ZrO2)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Polished brown jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct