11 avril 2016

Sphalerite, Seravezza Quarries, Seravezza, Apuan Alps, Lucca Province, Tuscany, Italy

Sphalerite, Seravezza Quarries, Seravezza, Apuan Alps, Lucca Province, Tuscany, Italy. Taille: 0.78 mm. Collection et photo Matteo Chinellato
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11 avril 2016

Calcite sur Heulandite, Deolali, Maharashtra, Inde

Calcite sur Heulandite, Deolali, Maharashtra, Inde. Taille: 22 mm. Photo Andreas Schmid.
Posté par Alain Truong à 23:43 - - Commentaires [0] - Permalien [#]
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11 avril 2016

Grenat, Northern area Shiger valley, Skardu, Pakistan

Grenat, Northern area Shiger valley, Skardu, Pakistan. Taille: 24 x 23 mm. Photo Tóth László
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17 mars 2016

Tourmaline on Cleavelandite, Brazil

Tourmaline on Cleavelandite, Brazil
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17 mars 2016

Metazeunerite on Smoky Quartz, Namibia

Metazeunerite on Smoky Quartz, Namibia
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17 mars 2016

Prehnite + Epidote, Mali

Prehnite + Epidote, Mali
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16 février 2016

An unmounted melo pearl

An unmounted melo pearl. Photo Bonhams The near-round undrilled melo pearl of orange hue, weighing 173.20 carat, measuring 29.3 x 27.9mm. Lot 671. Estimate HK$ 1.95 million - 2.72 million (€220,000 - 310,000). Unsold. Accompanied by a report from GIA, stating that the saltwater melo pearl is natural and has no indications of treatment. Report number 6112849002, dated 28 Jan 2011  BONHAMS. FINE JEWELLERY & JADEITE, 26 May 2012 14:00 HKT, HONG KONG, ADMIRALTY
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06 décembre 2015

AGTA Spectrum’s Cutting Edge Awards for 2015

The AGTA Cutting Edge Awards honor excellence and creativity of the lapidary arts, including natural colored gemstones and cultured pearls, carvings, other gem materials and objects of art in U.S. and Canada. A panel of judges will evaluate entries in the Cutting Edge Awards.The purpose of the Cutting Edge Competition is to celebrate the excellence and creativity of lapidary artists and colored gemstones.  Entries may incorporate existing lapidary techniques; however entries in Pairs & Suites, Innovative Faceting, Carving... [Lire la suite]
17 novembre 2015

Bright Orange Non-Nacreous Melo Pearl, Melo melo, Saltwaters near Vietnam

Bright Orange Non-Nacreous Melo Pearl, Melo melo , Saltwaters near Vietnam. Estimate US$ 25,000 - 30,000 (€23,000 - 28,000). Photo Bonhams. Relatively unknown in the West, even George Kunz's compendium of 1908, The Book of The Pearl, had no references to the rare orange pearl offered here. So few have been found, it is no wonder. The Melo melo is the marine snail that produces orange pearls the color of a ripe papaya. The snail generates a pearl-like substance to enclose foreign bodies, or irritants,... [Lire la suite]
Posté par Alain Truong à 20:19 - - Commentaires [0] - Permalien [#]
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14 novembre 2015

Rare Black Opal--"Mackerel or Ribbon Pattern", Lightning Ridge, New South Wales, Australia

Rare Black Opal, "Mackerel or Ribbon Pattern", Lightning Ridge, New South Wales, Australia. Estimate US$ 40,000 - 50,000 '€37,000 - 46,000). Photo Bonhams. A beautiful opal either by night or day, the present stone is particularly notable for its mackerel pattern, the name for the ribbon pattern of opalization which is so sought-after by knowledgeable opal collectors. Displaying extensive orange ribbons with some flashes of red, when the stone is rotated, iridescent green flashes abound, intermingled with some... [Lire la suite]