Organic Gem Material (Botanical)

Iridescent labradorite cabochon

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

Red corundum (ruby rough)

Corundum, aluminum oxide (Al₂O₃); ruby is chromium-bearing red corundum

Amber

Succinite (specifically for Baltic amber); Complex mixture of organic compounds (C10H16O)

Small pink-red mineral fragment, possibly ruby or corundum

Corundum (Al₂O₃), unconfirmed; visual identification is uncertain

Faceted colorless gemstone, likely quartz (rock crystal)

Quartz, SiO₂

Amber

Succinite (Fossilized Tree Resin)

Pearl

Pearl; primarily aragonite (CaCO₃) with conchiolin

Amber

Succinite (organic fossilized resin)

Turquoise jewelry beads/earrings

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly reconstructed or imitation turquoise

Raw Amber / Resin Mineral

Succinite (Fossilized Tree Resin)

Pearl

Calcium carbonate (CaCO3) + organic conchiolin (Biogenic Mineral)

Carved labradorite fish

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

Amber

Succinite (fossilized resin); C10H16O

Yellow chalcedony (likely citrine or iron-stained quartz)

Microcrystalline quartz, SiO₂; yellow coloration likely from iron oxides or included quartz varieties

White pebbles (rock material not identifiable from the image)

Undetermined; the smooth, pale pieces could be quartz, quartzite, or another light-colored rock

Sugilite

KNa2(Fe,Mn,Al)2Li3Si12O30 (Potassium Sodium Lithium Iron Manganese Aluminum Silicate)

Porphyritic Rhyolite (Birdseye Rhyolite)

Rhyolite (Porphyritic texture)

Yellow Quartz (Citrine Quartz / Milky Quartz)

Silicon Dioxide (SiO2)

Quartz vein material, likely milky quartz with iron staining

Quartz (SiO₂), possibly with feldspar and iron-oxide staining

Polished labradorite

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

Tumbled brown stone, possibly chert or iron-stained quartzite

Indeterminate from photograph; possible microcrystalline quartz (SiO₂)

Peridot (rough olivine crystals)

Olivine, chiefly forsterite–fayalite solid solution, (Mg,Fe)₂SiO₄; gem-quality olivine is called peridot

Amber

Succinite (fossilized resin, C10H16O)

Peridot

Olivine ((Mg,Fe)2SiO4)

Black Pearl (Tahitian Type)

Aragonite / Pinctada margaritifera (CaCO3 + Conchiolin)

Amber

Succinite (C10H16O)

Red faceted gemstone, possibly ruby (identification uncertain)

Ruby, if natural: corundum (Al₂O₃) colored by chromium

Tumbled cat’s-eye stone, likely cat’s-eye glass or imitation

Undetermined; natural chrysoberyl cat’s-eye is BeAl₂O₄, but the photo does not establish that identity

Petrified Wood

Silicified wood (Quartz replacement, SiO2)

Gold ring with a dark, possibly gemstone setting

Gold alloy; the dark setting is not identifiable from the image

Pink tourmaline rough crystals

Elbaite tourmaline, Na(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Pearls

Aragonite (calcium carbonate) and Conchiolin

Tumbled brown stone, possibly jasper or iron-rich chert

Indeterminate; likely microcrystalline quartz (SiO₂) with iron-oxide coloration

Foliated metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica gneiss/schist; exact identification requires petrographic examination

Tumbled blue-gray mineral specimen

Indeterminate; possibly dumortierite quartz, sodalite, or dyed stone

Blue Goldstone

Auraventurine (Synthetic glass with cobalt and copper inclusions)

Rose quartz bead bracelet

Quartz, SiO₂ (rose quartz variety)

Chert Pebble

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Pale green beryl (likely aquamarine)

Beryl, Be₃Al₂Si₆O₁₈; blue-green varieties are aquamarine

Rounded greenish pebble

Indeterminate; likely weathered quartzite, greenstone, or altered volcanic rock

Petrified Wood

Silicified Wood (SiO2)

Tumbled amethyst

Quartz, SiO₂; purple variety colored mainly by iron-related defects