Sunday, 22 April 2018

The "Twilight" Nugget: 7.8 kilos

On May 23, Bonhams will offer The "Twilight" Nugget: A Large and Important Natural Gold Specimen, among the largest known nuggets existing in the world today (estimate: $400,000-600,000). It was discovered circa 1990 in Dunolly, Central Victoria Goldfields, Australia and weighs approximately 20.83 Troy Pounds (approximately 7.8 kilos, 250.77 ozt or 7779.81 grams).

The "Twilight" Nugget will be on preview in The World of Gold, Opals and Other "Phenomenal" Gems at Bonhams Los Angeles from May 20-22.

Saturday, 21 April 2018

3.5-Carat Blue Diamond makes $6.7 Million

Sotheby’s held three jewelry auctions selling more than 400 lots that fetched more than $34 million with 83.3% of all lots sold. The star was a 3.47-carat fancy intense blue diamond that sold for $6.66 million, smashing its $2.5 million high estimate.

A 6.33-carat unmounted emerald-cut emerald from Colombia that sold for nearly $1.1 million ($172,986 per carat), nearly doubling its $600,000 high estimate.
An 11.24-carat cushion-cut Kashmir sapphire mounted on a diamond ring that sold for $999,000 ($88,879 per carat), doubling its high estimate.

A 7-carat square-cut fancy intense pink diamond mounted on a ring with an estimate of $4.2 million - $5.2 million.

Friday, 20 April 2018

Bonhams Lapidary Works of Art Gemstones, Minerals and Natural History

Rhodolite Garnet, Malawi, 30.06 carats. US$ 6,500 - 8,500Bonhams Lapidary Works of Art Gemstones, Minerals and Natural History is 16 May 2018 in Los Angeles.
Marra Mamba Tiger's Eye Bowl. Mount Brockman Station, Western Australia. US$ 6,000 - 8,000
Orange-Red Spessartite Garnet. 15.96 carats. US$ 1,500 - 2,000
Spessartite Garnet. Mozambique. 15.74 carats. US$ 8,000 - 10,000Large Demantoid Garnet. Ural Mountains, Russia. 4.62 carats. US$ 25,000 - 30,000Two Conch Pearls. Strombus gigas or "Queen Conch". Caribbean Sea. 11.32 carats and 9.15 carats. US$ 16,000 - 20,000
Exceptional Peridot. Pakistan. 47.83 carats. US$ 7,000 - 9,000Red Rhodochrosite. South Africa. 15.16 carats. US$ 8,000 - 10,000Ruby Parrots on Spinel and Pargasite base by Peter Mueller. US$ 20,000 - 30,000

Thursday, 19 April 2018

Tiffany & Co - the Blue Book

Tiffany & Co was founded by Charles Lewis Tiffany and John B. Young in New York City in 1837 as a "stationery and fancy goods emporium", the store initially sold a wide variety of stationery items, and operated as "Tiffany, Young and Ellis" in Lower Manhattan.

The name was shortened to Tiffany & Company in 1853 when Charles Tiffany took control and established the firm's emphasis on jewelry.
Tiffany & Co. operates jewelry and specialty retail stores and manufactures products. The Company operates retail stores and boutiques in the Americas, Asia-Pacific and Europe. The Company’s principal product category is jewelry, which represented 90% of worldwide sales.

The Company also sells timepieces, leather goods, sterling silver goods, china, crystal, stationery, fragrances and accessories, which represented 8% of worldwide sales in 2012.

For over 175 years, Tiffany & Co. has produced world-renowned jewelry collections.
Tiffany’s celebrated Blue Book is an annual publication that showcases the latest and most spectacular jewels, and has been arriving in customers’ mail boxes since 1845. It is the first mail order catalogue in the U.S.

Pakistan Ruby - Hunza Valley

The Hunza valley is home to Pakistan's ruby deposits. After Burma, one of the very few regions in the world to produce ‘Blood Red’ ruby is Hunza valley. The Hunza is situated in the extreme northern part of Pakistan. The real 'Shangri-La', it is a stunningly beautiful valley, towered over by five snowcapped mountains. The ruby belt in Hunza Valley stretches over an area of about 100 kilometers.
Ruby is a rare gem because the chromium pigments embedded in the earth’s crust are not plentiful and the chromium had to meet up with the element alumina at the exact moment that crystallization occurred. Without these two elemental factors the gem won't be red. The ruby deposits occur in metamorphosed re-crystallized limestone marble in a narrow belt from Hunza Valley to Ishkoman.

Wednesday, 18 April 2018

Conch Pearls

Among the rarest and most expensive type of pearl in the world, conch pearls are in demand once again thanks to the resurgence in popularity of natural pearls.

A conch pearl is a calcareous concretion produced by the Queen conch (“conk”) mollusc, which is a large, edible sea snail. Most often pink and oval, the finest examples display a wave-like “flame” structure on their surface and have a creamy, porcelain-like appearance and unique shimmer.
Harvested by teams of fishermen, a single, elusive conch pearl is found in every 10-15,000 shells, although less than 10% of these are gem quality.

This rarity, together with its colour, makes the conch pearl extremely desirable. Intense, saturated pink hues and pronounced flame structure (chatoyancy) are what most influence price.
Conch pearls are a by-product of a declining fishing industry. Caught primarily for its meat, the Queen conch is eaten throughout the Caribbean and the US. Overfishing has forced all but three conch-producing countries to ban fishing to protect decimated populations, which it is predicted will not recover for decades. This means ever fewer conch pearls are coming to market.

There are few recorded instances of the successful cultivation of conch pearls. Natural pearls, formed without human intervention, come with the “rare” tag that make them infinitely more desirable.

Tuesday, 17 April 2018

De Beers 1888 Master Diamonds collection

The 1888 Master Diamonds collection showcases combinations of intensity and clarity and reflect a dramatic display of coloured brilliance.

Each design is conceived to compliment the character of the diamond and not to detract from the beauty. They have been given the title of ‘1888 Master Diamonds' in recognition of the founding year of De Beers and the 125 year heritage of the brand.