Man Made Glass (Often Grouped With Minerals In Lapidary)

Concrete Fragment

Hardened Portland Cement Composite

Snowflake Obsidian

Volcanic glass with Cristobalite inclusions (70–75% SiO2)

Man-made earbud charging case (Not a rock or mineral)

Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components

Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation

Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass

Blue Goldstone

Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)

Carnelian (red chalcedony), possibly red agate or jasper

Chalcedony, a microcrystalline variety of quartz; silicon dioxide (SiO₂), commonly colored red-orange by iron oxides. The specimen may include opaque jasper or agate zones.

Likely green bottle glass, not a geological specimen

Manufactured soda-lime silicate glass

Titanium-coated Metal Cube (Man-made Fidget Toy)

Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)

Polymictic conglomerate or breccia (possibly concrete-like aggregate)

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

Jasper or Agate with Chlorite Inclusions

Silicon Dioxide (SiO2) with Chlorite group minerals

Diorite

Diorite (Intermediate intrusive igneous rock)

Tumbled black stone, likely black obsidian

Obsidian; volcanic glass, typically rhyolitic composition (SiO₂-rich)

Hematite Beads

Hematite (Fe2O3)

Rounded gray pebble, likely quartzite

Quartzite (predominantly crystalline quartz, SiO₂); identification is tentative from the image

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Concrete

Hydrated Portland Cement Aggregate Composite

Bismuth Crystal

Bismuth (Bi)

Aura Rose Quartz

SiO2 (Silicon Dioxide with Titanium/Gold coating)

White quartz pebbles

Quartz (silicon dioxide, SiO₂), likely milky quartz

Green Banded Chert (Agate/Jasper)

Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite

Chert (Jasper/Flint variant)

Silicon Dioxide (SiO2)

Obsidian

Volcanic Glass (Amorphous SiO2)

Red-orange jasper pebble (tentative)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Pink Cubic Zirconia (CZ)

Zirconium Dioxide (ZrO2)

Green Calcite

Calcite (CaCO3)

Chert (with Limestone matrix)

Silicon dioxide (SiO2)

Goldstone (blue/black aventurine glass)

Man-made aventurine glass; silica glass containing metallic copper or other glittering inclusions

Blue Goldstone

Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)

Feldspar

Potassium Feldspar (KAlSi3O8)

Red garnet (possible almandine or pyrope), cut/polished

Garnet-group silicate; likely almandine, Fe₃Al₂(SiO₄)₃, or pyrope, Mg₃Al₂(SiO₄)₃

Brick

Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)

Blue slag glass or dyed glass-like industrial material

Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass

Small clear crystal, possibly quartz or glass-like gemstone

Uncertain; likely quartz (SiO₂), but the image is insufficient to exclude man-made glass or cubic zirconia

Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

White drusy quartz

Quartz, silicon dioxide (SiO₂), with a drusy coating of tiny crystals

Fossiliferous limestone with colonial coral

Calcite (CaCO₃) limestone containing fossil tabulate or rugose coral colonies

Polished smoky quartz crystal point

Quartz (SiO₂), likely iron-colored or smoky quartz with milky inclusions

Botryoidal chalcedony with iron-oxide staining

Microcrystalline quartz (SiO₂), likely iron-oxide-bearing chalcedony

K-feldspar (Potassium Feldspar)

Microcline / Orthoclase (KAlSi3O8)

Feldspar

KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8

Man-made Ceramic / Clay Figurine

Aluminosilicate Ceramic (Processed Clay)