Man Made Material (Anthropogenic 'Mineraloid')

Quartzite

Metamorphic Quartzite (SiO2)

Green-and-white terrazzo (likely serpentine/marble aggregate)

Composite decorative stone; probable serpentinite (Mg₃Si₂O₅(OH)₄) with white calcite marble fragments in cementitious matrix

Pearl and Garnet Glass

Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass

Turquoise-style beaded bracelet

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly dyed or composite beads

Chert / Flint

Silicon Dioxide (SiO2)

Flint

Silicon dioxide (SiO2)

Chert

Microcrystalline Silicon Dioxide (SiO2)

Quartz (Microcrystalline/Chert)

Silicon Dioxide (SiO2)

Chert (Flint)

Silicon dioxide (SiO2)

Turquoise bead bracelet

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

Sandstone

Arenite (composed primarily of SiO2)

Chert / Flint

Silicon Dioxide (SiO2)

Chert Nodule

Microcrystalline Quartz

Chert (often called Flint or Jasper if reddish)

Microcrystalline Quartz (SiO2)

Coquina

Coquina (Biogenic Limestone / CaCO3)

Tektite

Natural impact glass

Multicolored beryl gemstone bracelet

Beryl, Be₃Al₂Si₆O₁₈; likely mixed aquamarine, morganite, heliodor, and green beryl beads

Sandstone

Sandstone (Quartz-rich Arenite / SiO2)

Sandstone (with potential Arkose/Lithic characteristics)

Arenite (Sedimentary rock composed of sand-sized grains)

Tumbled yellow jasper or chalcedony

Microcrystalline quartz, SiO₂; likely iron-oxide-bearing jasper/chalcedony

Chalk

Carbonate rock (mainly CaCO3)

Chalk

Calcite (CaCO3)

Sandstone

Arenite

Sandstone (Quartzose)

Arenite (primarily SiO2)

Quartzite

Metamorphic quartz rock (SiO2)

Carnelian cabochon pendant

Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)

Malaysian 50 Sen Coin

Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)

Carved serpentine pendant

Serpentine-group minerals, commonly antigorite/lizardite (Mg₃Si₂O₅(OH)₄), possibly mixed with chlorite or other inclusions

Weathered fossil shell fragment

Indeterminate bioclastic carbonate, likely molluscan shell (calcium carbonate, commonly aragonite or calcite)

Blue Slag Glass

Amorphous Silica (Byproduct of smelting)

Jade bangle

Likely nephrite jade (actinolite–tremolite amphibole); possibly jadeite

Ferrochrome Slag

Industrial Glassy Slag (Fe-Cr alloy byproduct)

Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)

Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)

Engineered Quartz Stone

Agglomerated Quartz (SiO2 + Polymer Resin)

Sandstone (Quartz Arenite)

Sandstone (dominated by SiO2 quartz grains)

Chert (Flint)

Microcrystalline Silica (SiO2)

Sandstone

Arenite (with iron oxide cement)

Amber (Black)

Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)

Blue faceted gemstone, likely synthetic sapphire or blue glass

Corundum (Al₂O₃) if sapphire; identity cannot be confirmed visually

Coquina

Bioclastic Limestone

Tumbled chalcedony (likely milky quartz)

Microcrystalline quartz, SiO₂; possibly pale agate or quartzite

Sandstone

Arenite (SiO2 composition dominant)