The World of Gold, Opals and Other Phenomenal Gems

Bonhams London
Los Angeles 7601 W. Sunset Boulevard Los Angeles CA 90046 Tel: +1 323 850 7500 Fax : +1 323 850 6090 [email protected]

Datum der Auktion: 20.05.2019

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Two Fluorescent Hyalite Opals--"Bubble Opal"

Utah This rare fluorescent opal originates from an old mining claim in Utah which is now exhausted. The cabochons display a fabulous adularescent light play and nearly water clear transparency. Although hyalite can be found in some other locations only this Utah deposit produced gem quality

Los #: 751

Schätzpreis: 500 $ - 700 $

Datum: 20.05.2019

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Two Pink Opal Drops

Andes Mountains, Peru Suitable for mounting as earrings, these two elongated pear-shaped drops are cut from translucent pink Andean opal, having homogenous pink color. Weighing approximately 42.5 and 42.0 carats and measuring 49.46 x 22.32 x 8.11mm

Los #: 752

Schätzpreis: 500 $ - 700 $

Datum: 20.05.2019

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Rare Suite of Nineteen Faceted Blue Opals

Andes Mountains, Peru Suitable for mounting as a necklace, pendant and ring: including a large pear-shaped blue opal, measuring 32 x 22.6 mm; a hexagonal shaped opal, 24 x 27.7 mm; an emerald-cut opal, 21.6 x 15.5 mm; a pair of octagons, 16.2 x 16.2mm each; four emerald-cuts, 19 x 13.4 mm; two

Los #: 753

Schätzpreis: 5.000 $ - 7.000 $

Datum: 20.05.2019

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Suite of Eleven Pink Opals

Andes Mountains, Peru Suitable for mounting as a necklace and pair of earrings, these pear-shaped cabochons display a rich pink and great translucency. Weight of largest stone 22.79 carats. Total aggregate weight 131.0 carats. (11

Los #: 754

Schätzpreis: 6.000 $ - 8.000 $

Datum: 20.05.2019

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Trapiche Emerald and Diamond Pendant

Coscuez, La Peña Blancas Muzo Mining District, Columbia Of large size for the species, this pretty pear-shaped cabochon of trapiche emerald cut formed along the longitudinal axis of a natural emerald crystal: the trapiche effect appears toward the bottom of the belly of the stone. Mounted in 18K

Los #: 755

Schätzpreis: 1.200 $ - 1.500 $

Datum: 20.05.2019

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Pair of Trapiche Emerald and Diamond Earrings

Each composed of an oval cabochon trapiche emerald of rich bluish-green, prong set, mounted in 18K yellow gold, each suspending a small circular diamond. The first cabochon, measuring approximately 12.9 x 10.6 x 7.4mm, the second, measuring approximately 13.1 x 10.0 x 6.1mm, with a total combined

Los #: 756

Schätzpreis: 1.500 $ - 2.000 $

Datum: 20.05.2019

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Trapiche Emerald and Diamond Pendant

Muzo, Columbia Comprising a circular cabochon emerald, measuring 11.8 x 11.6 x 7.3mm, with an estimated weight of 8.0 carats) of even saturation of slightly bluish green with a well-centered and defined six-rayed star, suspending a single circular diamond, weighing approximately 0.30 carats, mounted

Los #: 757

Schätzpreis: 1.000 $ - 1.500 $

Datum: 20.05.2019

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Unusual Trapiche Emerald Cabochon of Impressive Size

Muzo, Colombia A high domed cabochon which has been polished with a high dome to display six distinct sides. the slightly domed bottom of the stone displays the six-spoke trapiche effect to distinct advantage. Weighing approximately 41.91 carats and measuring 20.07 x 19.81 x 13.57mm

Los #: 758

Schätzpreis: 6.000 $ - 8.000 $

Datum: 20.05.2019

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Set of Cat's Eye Tourmalines

World Localities An incredible collection which took many years to create including over 200 cat's eye tourmalines placed to form a circle measuring 7 inches across (nearly 17.5cm). The stones were selected to complete a pattern which graduates in color and displays the wide range of colors in which

Los #: 759

Schätzpreis: 90.000 $ - 120.000 $

Datum: 20.05.2019

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Rare "Bloodshot" Iolite

Yemen Bloodshote Iolite is a mixed gemstone of purplish-blue colored Iolite and red-colored Lepidocrocite. Another name for it is "aventurine Iolite". Once can see iridescent inclusions shining under reflected light. A rare gemstone, very infrequently seen in the market, the present example is an

Los #: 760

Schätzpreis: 500 $ - 700 $

Datum: 20.05.2019

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Aventurescent "Goldstone" Box

An antique box, formed of slabs of polished goldstone glass, bordered in gilt-washed fittings, raised on four ball feet. Goldstone is a type of glittering glass made in a low-oxygen reducing atmosphere. The finished product can take a smooth polish and be carved into beads, figurines, or other

Los #: 760A

Schätzpreis: 700 $ - 900 $

Datum: 20.05.2019

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Rare Cat's Eye Demantoid Garnet from a Rare Locality

Kerman Province, Iran Demantoid garnet is one of the most valuable members of the garnet family--chatoyant demantoids are almost never seen. The few examples which have reached the market originated from the central Ural Mountains in Russia. However in 2001 a new source of demantoid garnet was found

Los #: 761

Schätzpreis: 1.500 $ - 2.000 $

Datum: 20.05.2019

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Cat's Eye Nephrite

Ural Mountains, Russia The phenomenon of chatoyancy is rarely seen in the mineral nephrite. The present oval cabochon has a broad cat's eye effect dominating its high dome. Weighing approximately 39.90 carats and measuring 23.16 x 19.39 x 11.11mm

Los #: 762

Schätzpreis: 700 $ - 900 $

Datum: 20.05.2019

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Cat's Eye Aquamarine

Brazil An oval cabochon cat's eye aquamarine having a well-saturated sea blue color and good luster. Weighing approximately 28.38 carats and measuring 21.86 x 15.60 x 10.74mm

Los #: 763

Schätzpreis: 1.500 $ - 2.000 $

Datum: 20.05.2019

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Grey Cat's Eye Tourmaline

A large, circular cabochon with excellent central cat's eye effect. with grey body color. This is a rare color for tourmaline. Weighing approximately 11.0 carats and measuring 28.51 x 16.6mm

Los #: 764

Schätzpreis: 2.500 $ - 3.000 $

Datum: 20.05.2019

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Cat's Eye Tanzanite

Arusha, Tanzania A large, deep cabochon which displays not only very fine, rich violet hue but also a well-formed cat's eye effect at the apex of the dome. Weighing approximately 23.51 carats and measuring 13.53 x 12.71mm

Los #: 765

Schätzpreis: 25.000 $ - 35.000 $

Datum: 20.05.2019

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Cat's Eye Danburite

Burma Danburite is a silicate mineral found scattered throughout the planet in unassuming colors from pale yellow to brown. With a Mohs hardness of 7 to 7.5, Danburite is durable enough to be mounted in jewelry and worn as frequently as any major gemstone. The present offering is a large oval

Los #: 766

Schätzpreis: 2.000 $ - 3.000 $

Datum: 20.05.2019

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Multi-star Quartz Double Cabochon--"A Member of the 100 Carats Club"

A large double cabochon quartz which exhibits six-rayed asterism not only on both domes but in a multitude of other locations. The asterism is strong and easily discernible. Weighing approximately 192.0 carats and measuring 34.76 x 24.94mm

Los #: 767

Schätzpreis: 2.000 $ - 3.000 $

Datum: 20.05.2019

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Kyanite Bead Necklace

Brazil Comprising 41 spherical beads of kyanite each with chatoyancy effect, slightly graduating from 16 to 14mm at the ends, completed with a silver clasp, length 24 in

Los #: 768W

Schätzpreis: 600 $ - 800 $

Datum: 20.05.2019

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Pair of Rainbow Moonstone Cabochons

Two circular cabochons, weighing 3.18 and 4.04 carats and each measuring 9.0mm in diameter, displaying a very good rainbow iridescence or adularescence. (2

Los #: 769

Schätzpreis: 300 $ - 500 $

Datum: 20.05.2019

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Pair of Moonstone Cabochons

Tanzania Each of pear-shaped outline, having excellent blue adularescence, suitable for mounting as earrings, weighing 4.69 carats and 4.88 carats and measuring 13.23 x 9.8 x 5.8mm and 13.45 x 9.86 x 5.6mm. (2

Los #: 770

Schätzpreis: 300 $ - 500 $

Datum: 20.05.2019

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Pair of Moonstone "Grape Cluster" Earpendants

Each composed of a cluster of polished moonstone drops, having excellent blue adularescence, weighing approximately 42.90 carats. Height of grape cluster: 1 in, removable from silver earwires

Los #: 771

Schätzpreis: 1.000 $ - 1.500 $

Datum: 20.05.2019

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Suite of Seven Star Ruby Cabochons

Mysore, India Comprising seven oval cabochon star rubies, with weights as follows: 177.5 carats; 172.5 carats; 132.5 carats; 91.0 carats; 105.5 carats; 69.30 carats; 63.08 carats. Total weight approximately 813 carats. (7

Los #: 772

Schätzpreis: 4.000 $ - 5.000 $

Datum: 20.05.2019

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Red Andesine Feldspar

Democratic Republic of Congo A gem-quality variety of the feldspar group, this luscious red stone with deep saturation of color, is highly transparent. Weighing approximately 10.27 carats and measuring 18.08 x 13.01 x 7.51mm

Los #: 773

Schätzpreis: 300 $ - 500 $

Datum: 20.05.2019

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Blue Star Sapphire

Burma Of oval lenticular form, this fine double-sided cabochon of rich, medium blue color with a well-formed 6-rayed star to each face. Weighing approximately 41.04 carats and measuring 23.30 x 18.43 x 9.83 mm

Los #: 774

Schätzpreis: 12.000 $ - 15.000 $

Datum: 20.05.2019

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Large Cat's Eye Chrysoberyl

Sri Lanka A circular cabochon of large size with a well-formed dome, having an excellent, central cat's eye effect and a pleasant honey-toned body color. Weighing approximately 84.76 carats and measuring 22.19 x 17.82mm

Los #: 775

Schätzpreis: 6.000 $ - 8.000 $

Datum: 20.05.2019

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Exceptional Fire Agate

Aqua Calientes, Sonora, Mexico The world's only known fire agate deposits fall within two general areas-the Sonoran Desert region, stretching from southwest United States to northern Mexico, an area starting 100 miles north of Mexico City and lying between two north-south mountain ranges, the Sierra

Los #: 775A

Schätzpreis: 1.200 $ - 1.500 $

Datum: 20.05.2019

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Star Sapphire

Sri Lanka A classic oval cabochon star sapphire, having a desirable cornflower blue color. The star sits prominently at the apex of the stone and it is well-defined and complete. Weighing approximately 17.93 carats and measuring 13.69 x 11.68 x 10.03mm

Los #: 776

Schätzpreis: 7.000 $ - 9.000 $

Datum: 20.05.2019

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Star Ruby

Burma A large oval cabochon of purplish red ruby, displaying a six-rayed asterism which is central, strong and well-defined. This is an attractive and desirable stone for the knowlegable collector. Weighing approximately 25.58 carats and measuring 16.75 x 14.82 x 9.35mm

Los #: 777

Schätzpreis: 70.000 $ - 80.000 $

Datum: 20.05.2019

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Rainbow Obsidian Carving Depicting a Butterfly

Jalisco, Mexico Contour polished in such a way that successive layers or bands of color inherent in the obsidian have been revealed. The imaginative carver has used these hues to make a colorful depiction of a butterfly. A handsome table top sculpture or cabinet piece sure to grace any home

Los #: 778

Schätzpreis: 1.200 $ - 1.500 $

Datum: 20.05.2019