14 juin 2011

An opal and diamond necklace.

An opal and diamond necklace. Photo Philips de Pury & Co Designed as a line of graduating variously-shaped cabochon opals, millegrain-set between brilliant-cut diamond spacers to a graduating fringe of similarly shaped opals and opal pendant clasp, necklace length 43 cm, central pendant length 6.3 cm. ESTIMATE £14,000-18,000 - SOLD AT £17,500 Philips de Pury & Co. Jewels. 1 june 2011. London www.phillipsdepury.com
Posté par Alain Truong à 21:33 - - Commentaires [0] - Permalien [#]
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14 juin 2011

A pair of opal and diamond ear pendants.

A pair of opal and diamond ear pendants. Photo Philips de Pury & Co Each designed as a graduating line of variously-shaped cabochon opal between old brilliant-cut diamond spacers, length 6.3 cm, total opal weight approximately 11.8 carats, ear wire fittings. ESTIMATE £1,200-1,800 -SOLD AT £1,500 Philips de Pury & Co. Jewels. 1 june 2011. London www.phillipsdepury.com
Posté par Alain Truong à 21:27 - - Commentaires [0] - Permalien [#]
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14 juin 2011

An opal and diamond ring.

An opal and diamond ring. Photo Philips de Pury & Co The central oval opal, weighing approximately 14.00 carats, claw-set within a brilliantcut diamond cluster to baguette-cut diamond shoulders, ring size O. ESTIMATE £3,500-5,500 - SOLD AT £6,250 Philips de Pury & Co. Jewels. 1 june 2011. London www.phillipsdepury.com
Posté par Alain Truong à 20:16 - - Commentaires [0] - Permalien [#]
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06 février 2011

Platinum, Opal, Rock Crystal and Diamond Necklace, Tiffany & Co., retailed by Bailey, Banks & Biddle, first half 20th Century.

Platinum, Opal, Rock Crystal and Diamond Necklace, Tiffany & Co., retailed by Bailey, Banks & Biddle, first half 20th Century. photo Sotheby's The graduated single-strand composed of opal beads measuring approximately 13.6 to 6.2 mm., spaced by faceted rock crystal rondelles measuring approximately 7.5 to 3.9 mm., the clasp set with old European-cut diamonds weighing approximately .15 carat, length 19 inches, partially obscured signature for Tiffany & Co., signed BBB, numbered 91546. Estimate 20,000—30,000 USD. Lot... [Lire la suite]
Posté par Alain Truong à 19:36 - - Commentaires [0] - Permalien [#]
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13 novembre 2010

Gem-Quality East African Prase Opal. Mount Iyobo, Tanzania

Gem-Quality East African Prase Opal. Mount Iyobo, Tanzania © 2002-2010 Bonhams 1793 Ltd Weighing approximately 28.35 carats and measuring 22.5 x 19.0 x 11.0mm - Sold for $3,050 Both chrysoprase and prase opal have been mined on Iyobo Mountain in central Tanzania for more than 20 years, with the first discoveries having been described by Dr. Edward Gübelin in 1975. Prase opal is a nickel-bearing variety of common opal, where nickel is the chromophore (the part of a molecule responsible for its color) that lends the neon... [Lire la suite]
Posté par Alain Truong à 15:59 - - Commentaires [0] - Permalien [#]
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13 novembre 2010

Hydrophane White Opal with Intense Fire. 570 km north of Addis Ababa, Wello (Wollo), Delanta Plateau, Tigray, Ethiopia

Hydrophane White Opal with Intense Fire. 570 km north of Addis Ababa, Wello (Wollo), Delanta Plateau, Tigray, Ethiopia © 2002-2010 Bonhams 1793 Ltd Weighing approximately 10.10 carats and measuring 21.5 x 14.0 x 7.5mm - Sold for $1,464 This is an excellent precious opal from the leading local mine found in Wello province, Delanta region, around 2700 ft above sea level and 570 km northwest of the capital city Addis Ababa. Discovered in 2008 gem crystal and hydrophane opal from Wello Ethiopia has recently come to the... [Lire la suite]
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12 novembre 2010

Rare Boulder Opal and Diamond Necklace—"The Black Rainbow". Queensland, Australia

Rare Boulder Opal and Diamond Necklace—"The Black Rainbow". Queensland, Australia © 2002-2010 Bonhams 1793 Ltd Designed and fabricated by James Currens. 2009 AGTA Spectrum Award Winner for 1st Place—Phenomenal Gemstone Category Featuring a fancy cabochon natural boulder opal, weighing approximately 34.80 carats, exhibiting the most extraordinary ribbon pattern characterized by strong horizontal stripes of iridescent green and electric blue on an ironstone matrix. The exquisitely hand-fabricated platinum... [Lire la suite]
Posté par Alain Truong à 23:12 - - Commentaires [0] - Permalien [#]
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12 novembre 2010

Rare Indonesian Hyrdophane Opal. Rangkasbitung, Banten Province, West Java, Indonesia

Rare Indonesian Hyrdophane Opal. Rangkasbitung, Banten Province, West Java, Indonesia  © 2002-2010 Bonhams 1793 Ltd Weighing approximately 23.0 carats and measuring 23.0 x 22.5 x 9.75mm. Sold for $2,745 It is a little known fact that Indonesia produces some of the most beautiful opals in the world – although still in very small quantities. The opals are all of volcanic origin and just about every type of opal can be found including milky white, crystal white opals, boulder opal (but not with an ironstone matrix as in... [Lire la suite]
Posté par Alain Truong à 22:46 - - Commentaires [0] - Permalien [#]
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12 novembre 2010

Very Fine Mexican Jelly Opal—The National Gemstone of Mexico. Magdelena, Jalisco, Mexico

Very Fine Mexican Jelly Opal—The National Gemstone of Mexico. Magdelena, Jalisco, Mexico © 2002-2010 Bonhams 1793 Ltd Weighing approximately 8.95 carats and measuring 18.0 x 13.0 x 8.0 mm - Sold for $8,540 Opals were formed during the Cretaceous period and brought to the Earth's surface during the Pleistocene age. There are 25 or so varieties of opals but the most significant fire opal deposits are found in Mexico. One of the two largest sites for mining the Mexican fire opal, is located near Magdalena, Jalisco, a small city... [Lire la suite]
Posté par Alain Truong à 22:34 - - Commentaires [0] - Permalien [#]
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16 octobre 2010

Buccellati jewelry from the Blanche Thebom collection

A pair of South Sea cultured pearl and diamond earrings, Buccellati. © 2002-2010 Bonhams 1793 Ltd each designed as a floral surmount detailed with round brilliant-cut diamonds suspending a drop-shaped cultured pearl measuring approximately 14.0 x 12.5mm; signed Buccellati, with signed fitted gray leather box; estimated total diamond weight: 2.00 carats; mounted in eighteen karat gold - Estimate: $5,000 - 7,000 An opal, sapphire and ruby ring, Buccellati. © 2002-2010 Bonhams 1793 Ltd centering a black opal accentuated... [Lire la suite]
Posté par Alain Truong à 18:54 - - Commentaires [0] - Permalien [#]
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