LOS ANGELES, CA.- From May 20 to 22, Bonhams announces a series of four auctions - The World of Gold, Opals and Other Phenomenal Gems on May 20, Lapidary Works of Art, Gemstones and Minerals on May 21, Natural History on May 22, as well as Designers' Resource: Gems, Beads, Minerals and Décor, an online sale from May 18-29.

The World of Gold, Opals and Other Phenomenal Gems
May 20 at 1pm PDT
Bonhams sale of The World of Gold, Opals and Other Phenomenal Gems features 180 lots, which includes a spectacular Rare Double-sided Black Picture Opal-- "Bush Fire Over the Mountain" (estimate: $120,000-150,000); a Set of Cat's Eye Tourmalines (estimate: $90,000-120,000); a fine California Crystallized Gold-in-Quartz (estimate: $80,000-120,000); and a Historic Australian Black Opal--"The Glengarry Orchid", mined in 1972 (estimate: $80,000-120,000).

Lapidary Works of Art, Gemstones and Minerals
May 21 at 10am PDT
The sale of Lapidary Works of Art, Gemstones and Minerals brings together over 250 lots highlighted by a Classic, Exceptional Large Spinel from Pamir Mountains, Tajikistan (estimate: $180,000-220,000); a Large Rubellite Tourmaline from the "Cranberry Pocket" (estimate: $80,000-100,000); a Very Large Demantoid Garnet from Ural Mountains, Russia (estimate: $35,000-45,000); and a rare Aquamarine Cluster with Muscovite (estimate: $20,000-30,000).

Natural History
May 22 at 10am PDT
The Natural History sale offers a wide variety of fossils and meteorites, including dinosauria, highlighted by a 20-foot-long Mosasaurus from Kansas (estimate: $200,000-250,000), an extremely large colony of Jurassic Crinoids, measuring 16 feet (estimate: $300,000-400,000), an impressive Quartz Sphere weighing 2,420 lbs (estimate: $300,000-450,000), a rare Flying Reptile, Rhamphorhynchus, from Germany (estimate: $45,000-55,000) and an immense Pallasitic Meteorite composed of the only outer space gemstone – olivine - in an iron-nickel matrix (estimate: $300,000 – 400,000). Estimates range from $600 to $450,000.