Mineral, Jewelry

Yellow Quartz

Silicon Dioxide (SiO2)

Polished peach moonstone

Moonstone, a feldspar variety; likely orthoclase (KAlSi₃O₈)

Blue topaz-style pendant gemstone

Likely blue topaz (Al₂SiO₄(F,OH)₂); the image cannot confirm the stone or whether it is natural or synthetic.

Polished orbicular jasper (likely leopard-skin or brecciated jasper)

Microcrystalline quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the photo

Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Blue goldstone (man-made glass)

Copper-bearing aventurine glass; synthetic silicate glass

Limonite

FeO(OH)•nH2O

Quartz

Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2)

Blue-green rough mineral specimen (identity uncertain)

Undetermined; the image is insufficient for a reliable mineral identification

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Beaded gemstone bracelet

Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

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

Yellow Quartz

Silicon Dioxide (SiO2)

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Raw amethyst

Quartz, SiO₂; purple coloration from trace iron and irradiation

Smoky quartz

Quartz (silicon dioxide, SiO₂)

Amethyst (small rough crystal)

Quartz, SiO₂; purple color from trace iron and natural irradiation

Amethyst (rough quartz crystal)

Amethyst, purple variety of quartz (SiO₂)

Tumbled amethyst (likely)

Quartz, SiO₂; purple coloration is typically caused by trace iron and natural irradiation

Clear quartz crystal cluster

Quartz (silicon dioxide, SiO₂)

Tumbled amethyst

Quartz (SiO₂), purple variety known as amethyst

Likely rough amethyst

Quartz, SiO₂; purple variety colored mainly by iron impurities

Tumbled orange aventurine (likely)

Quartz, SiO₂, colored by iron-bearing inclusions; exact identification is uncertain from the photo

Peridot

Olivine (Mg,Fe)2SiO4

Rose quartz (tumbled)

Quartz, SiO₂; pink variety commonly called rose quartz

Native gold (small nugget or grain)

Native gold, Au

Smoky Quartz with Rutile Inclusions

Silicon Dioxide (SiO2) with TiO2 needles

Quartz with Tourmaline inclusions

Silicon Dioxide (SiO2) with Tourmaline needles

Quartz and Mixed Minerals

Silicon Dioxide (SiO2)

Red Coral and Shell

Corallium rubrum and Conus/Mollusk shell

Fossilized Ammonite Fragment

Ammonoidea

Polished dendritic agate cabochon

Microcrystalline quartz (chalcedony), SiO₂, with iron/manganese dendrites and possible plume inclusions

Quartz

Silicon Dioxide (SiO2)

Quartz Crystal

Silicon Dioxide (SiO2)

Turquoise

CuAl6(PO4)4(OH)8·4H2O

White druzy quartz pendant with a blue crystal accent

Quartz (SiO₂); the blue material is not identifiable from the image

Likely garnet crystal (rough fragment)

Garnet group; possibly almandine, Fe₃Al₂(SiO₄)₃

Malachite

Copper Carbonate Hydroxide, Cu2CO3(OH)2

Orange chalcedony pebble (likely carnelian)

Chalcedony, microcrystalline quartz (SiO₂); orange-red variety commonly called carnelian

Moonstone

Orthoclase (KAlSi3O8)

Turquoise

CuAl6(PO4)4(OH)8·4H2O