Man Made (Synthetic Rock)

Blue-green turquoise (probable)

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

Fossilized Coral (Coquina/Limestone)

Cnidaria Anthozoa (Fossilized)

Faceted Gemstones (Mixed)

Various (e.g., Corundum, Beryl, Quartz, or synthetic equivalents)

Quartzite

Metamorphic Quartz Rock (SiO2)

Granite

Intrusive Igneous Rock (Granitic)

Sandstone

Arenite (composed primarily of SiO2)

Red cabochon gemstone ring

The stone may be carnelian (orange-red chalcedony, SiO₂); the image is insufficient to identify it reliably.

Tumbled sea glass or pale-green quartz pebble

Indeterminate from image; possibly quartz (SiO₂), but the smooth translucent piece may be man-made glass

Faceted Clear Gemstone (Likely Quartz or Cubic Zirconia)

Silicon Dioxide (SiO2) or Zirconium Dioxide (ZrO2)

Quartzite

Metamorphic Quartz Rock (SiO2)

Quartzite

Metamorphic Quartz Rock (SiO2)

Sandstone

Clastic Sedimentary Rock

Polished labradorite cabochon

Labradorite, calcium-rich plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈

Blue-green tumbled gemstone, likely turquoise or dyed turquoise

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

Red granite boulder

Granite, a coarse-grained felsic intrusive igneous rock; commonly quartz + feldspar + mica

Brick veneer, likely manufactured from clay-rich shale

Fired clay brick; chiefly aluminosilicate minerals, commonly mullite and glassy silicate phases after firing

Likely beach-worn glass and a pebble

The brown piece appears to be weathered glass (amorphous SiO₂-rich material); the pale piece is likely a small quartz-rich stone, possibly milky quartz.

Fossil Coral

Scleractinia (Stony Coral) fossil

Sandstone (Ferruginous)

Arenite (SiO2 with Fe2O3 inclusions)

Faceted Quartz or Cubic Zirconia

SiO2 (Quartz) or ZrO2 (Cubic Zirconia)

Granite

Felsic intrusive igneous rock

Colorless faceted gemstone, likely glass or cubic zirconia

Uncertain; possible cubic zirconia (ZrO₂) or quartz (SiO₂), but the image may show a man-made simulant

Colorless faceted quartz-like gemstone

Likely quartz (SiO₂), though the appearance may also indicate man-made glass or cubic zirconia

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)

Sandstone

Arenite (mostly SiO2)

Green glassy gemstone-like specimen

Likely synthetic glass or treated quartz; exact identification requires testing

Lapis Lazuli

A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).

Sandstone

Arenite (composed primarily of SiO2)

Chert (Flint / Quartz Nodule)

Microcrystalline Quartz (SiO2)

Quartzite

Metamorphic Rock (Mainly SiO2)

Mood Ring Stone

Liquid crystal thermotropic polymer

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

Black faceted gemstone, possibly black spinel or synthetic material

Undetermined from image; candidates include spinel (MgAl₂O₄) or black sapphire (corundum, Al₂O₃)

Sandstone

Sedimentary Rock (Quartz Sandstone)

Red faceted gemstone, likely synthetic ruby

Corundum (Al₂O₃); ruby when red, possibly laboratory-grown

Mixed polished gemstone and mineral collection

Primarily quartz varieties (SiO₂), plus probable aventurine, rose quartz, amethyst, agate, jasper, serpentine, feldspar, and possibly dyed or man-made glass pieces

Granite

Phaneritic Felsic Igneous Rock

Sandstone Pebble

Ferruginous Sandstone (SiO2 with Fe2O3)

Red gemstone, likely ruby

Corundum (Al₂O₃), colored red by chromium

Sandstone

Arenite (SiO2 based clastic rock)

Banded Gneiss

Gneiss (Foliated Metamorphic Rock)

Granite

Granite (Plutonic Igneous Rock)