Tumbled amber-colored chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
mineral
Category
Man Made Glass
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Blue-beaded gemstone jewelry, likely lapis lazuli or dyed blue agate
Uncertain from the image; possible lazurite-bearing lapis lazuli (Na₃Ca(Si₃Al₃)O₁₂S) or blue chalcedony (SiO₂)
gemstone
Obsidian
Obsidian (volcanic glass)
Igneous
Chert (specifically Jasper or Flint variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (Carbon-based organic compound; approximate formula C10H16O)
Mineraloid
Chert
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Tumbled purple chalcedony or low-grade amethyst bead bracelet
Chalcedony (microcrystalline SiO₂), possibly quartz/amethyst; composition is SiO₂
mineral
Decorative gemstone bracelet or jewelry
Unidentifiable from the blurred image; likely colored glass or synthetic stones, possibly mixed gemstone beads
gemstone
Tumbled iron-rich stone, likely hematite-bearing jasper
Jasper (microcrystalline quartz, SiO₂) with iron oxides, chiefly hematite/goethite
mineral
Chert (and Jasper/Chalcedony mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)
mineral
Chert / Green Jasper
Silicon Dioxide (SiO2)
sedimentary
Basalt
Basalt
igneous
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Chert (Tan/Brown variety)
Chert (Silicon Dioxide, SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Chert (specifically Zebra Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Nodule)
Chert (SiO2)
sedimentary
Beaded gemstone bracelet, likely lapis lazuli and pale quartz/agate
Lapis lazuli: lazurite-rich rock, chiefly (Na,Ca)₈(AlSiO₄)₆(S,SO)₂; pale beads are uncertain
gemstone
Chert (often called Flint for darker varieties)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Chert (and Jasper/Flint variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper / Quartz pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
US Penny
Cuprum (Copper: Cu) and Zincum (Zinc: Zn) Alloy
Man-made object (metal alloy)
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Chert (Grey-Green Flint)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Chert (Nodule/Pebble)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (specifically Black Chert or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Flint
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Diamond
Carbon (C)
mineral
Amethyst gemstone ring
Quartz, purple variety — SiO₂
gemstone
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartz (Engineered Quartz Surface)
Silicon Dioxide (SiO2) based composite
mineral (man-made composite)
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Obsidian
Obsidian (volcanic glass, amorphous silica rich rock)
Igneous
Chert (specifically Gray/Blue-Gray Chert)
Chert (SiO2)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Carved quartz skull, likely smoky quartz or gray chalcedony
Silicon dioxide (SiO₂), quartz or microcrystalline quartz
gemstone