Mineral Composite

Blue-green quartz-rich stone, possibly chrysoprase or aventurine

Uncertain; likely quartz (SiO₂) with green coloration from nickel-bearing minerals or inclusions

Magnetic Hematite (Man-made)

Iron Oxide (Fe2O3) with Barium-Strontium Ferrite

Opal ring

Common opal, likely synthetic or assembled blue-green opal (hydrated amorphous silica, SiO₂·nH₂O)

Concrete

Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)

Asphalt / Road Aggregate

Bituminous Conglomerate (synthetic)

Feldspar-Quartz Rock (likely Pegmatite or Granite)

Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)

Polished turquoise sphere with purple matrix/inclusion

Turquoise, hydrated copper–aluminum phosphate; approximate formula CuAl₆(PO₄)₄(OH)₈·4H₂O

Composite Turquoise or Reconstituted Turquoise with Copper inclusions

CuAl6(PO4)4(OH)8·4H2O (Turquoise) mixed with matrix and copper/bronze flakes

Graphite

Graphite (Native Carbon, C)

Crushed Granite and Quartz Gravel

Composite Igneous and Silicate Rock Aggregate

Rounded pebble with a brown mineral or rock inclusion

Unidentified lithic pebble; the pale matrix and brown patch cannot be identified reliably from the image

Tiger Iron

Mixed Quartz, Hematite, and Tiger's Eye

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

Mixed polished gemstone bead bracelet, likely ocean jasper, agate, and quartz varieties

Mostly microcrystalline quartz (SiO₂), with possible chalcedony, jasper, and minor feldspar or other inclusions

Jasper and Chalcedony Nodule

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Buffalo Nickel (Indian Head Nickel)

Cupronickel (75% Copper, 25% Nickel)

Asphalt Concrete (Bituminous Concrete)

Bituminous aggregate

Dragon Blood Jasper

Epidote-bearing Quartz Microcrystalline Aggregate

Ruby zoisite (anyolite)

Zoisite with corundum (ruby) and commonly amphibole; Ca₂Al₃(SiO₄)₃(OH)

Polished blue copper mineral, likely chrysocolla or dyed howlite

Chrysocolla: hydrated copper phyllosilicate, approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; visual identification is uncertain from the image

Engineerged Quartz (Quartz Composite)

SiO2 (Silicon Dioxide) in a polymer resin matrix

Asphalt Concrete

Bituminous Concrete

Concrete / Conglomerate (Man-made)

Artificial Conglomerate (Cementitious Composite)

Sandstone-based Concrete Fragment

Cementitious Composite with Sedimentary Aggregate

Pearl (likely Freshwater or Akoya Cultured)

Aragonite / Conchiolin composite (CaCO3)

Small tumbled blue-green stone, possibly chrysocolla or turquoise

Indeterminate copper-bearing mineral; possible chrysocolla (Cu₂H₂Si₂O₅(OH)₄·nH₂O) or turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O)

Carved Gemstone Mushroom

Quartz / Feldspar composite (Carved lapidary art)

Carved turquoise arrowhead/pendant

Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O

Asphalt (Bituminous Concrete)

Asphaltum / Bitumen-Aggregate Matrix

Purple Turquoise (Composite Mojave Turquoise)

CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate composite)

Decorative mosaic cross containing mixed rock and glass fragments

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

Mother of Pearl (Nacre)

Aragonite (CaCO3) with Organic Matrix

Small polished jasper or agate pebble

Likely microcrystalline quartz (SiO₂); exact variety cannot be determined from the photo

Ruby in Zoisite

Anyolite (composite of Corundum and Zoisite)

Black Pearl (Tahitian Type)

Aragonite / Conchiolin composite (CaCO3)

Glazed Ceramic Tile

Fused Silicate-Clay composite

Blue-green chrysocolla rough specimen

Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite

Tiger Iron

Banded Iron Formation with Tiger's Eye, Jasper, and Hematite

Tumbled turquoise-bearing stone (likely turquoise or chrysocolla)

Turquoise: CuAl₆(PO₄)₄(OH)₈·4H₂O; possible chrysocolla: hydrated copper silicate

Turquoise ring (likely stabilized or imitation turquoise)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact material is uncertain from the image

Gemstone Art Panel (Jade, Quartz, and Soapstone)

Composite of silicate minerals (Nephrite, Quartz, Talc/Soapstone)

Blue-green cabochon pendant, likely turquoise or composite turquoise

Turquoise: hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification is uncertain from the blurred image