Saturday, 19 January 2019

Lapidary Works of Art, Gemstones and Minerals at Bonhams

Bonhams latest auction was Dec 8. An extremely rare benitoite gem brought $22,500.

The sole source of benitoite was a small mine in San Benito County in northern California which is now closed. Most of the rough yields cut gems below ½ carat. This 2.08 carat example is truly exceptional.

An amber nugget necklace made $1,750
Morganite is the orange to pink variety of beryl. This 97.07 carat example brought $5,000.

A fine cushion-shaped morganite of 39.81 carats made $6,800.
A fine, radiant-cut aquamarine, 75.79 carats, $12,500.

Cat's Eye Chrysoberyl from Sri Lanka, 28 carats, $21,250

Friday, 18 January 2019

The Ophir Collection

A total of 40 rare and exquisite gemstones are included in the collection, the majority of which are the largest known specimens of their kind in the world. It has been awarded nine Guinness World Record titles.

All gemstones in the collection, with the exception of one, have been certified by the GIA.
GIA and several other leading authorities on gemstone identification, were unable to identify one gemstone in the collection, suggesting that it is a new mineral. The Ophir Collection has named this unknown gemstone – the Ophir Mystique.

It has the distinction of being both the largest and possibly the only specimen of its kind in the world.

Thursday, 17 January 2019

Lucara lands 127 carat diamond

Lucara Diamond (LUC.t) has reported another giant find at its flagship Karowe diamond mine in Botswana. The 127 carat gem quality white diamond is one of 129 precious stones over 100 carats the company has recovered since it began operations in 2012. That tally includes 12 diamonds larger than 300 carats, including the world's second largest. Despite the many large stones Lucara share price has languished.

Wednesday, 16 January 2019

Angola to host 'special' diamond sale

The first competitive sale of large and premium-quality diamonds from the Lulo diamond mine will take place on January 31, 2019, in Luanda. Lulo is a 3,000 sq-km concession in the Lunda Norte region. It has produced a steady supply of large diamonds. Lulo yielded 118 special diamonds in the first half of 2018, including a 46-carat pink stone. 7 exceptional Lulo diamonds, including the pink and six Type IIa white gems ranging from 114 carats to 43 carats will be featured.Angola is the world’s No.4 diamond producer by value and No.6 by volume.

Tuesday, 15 January 2019

'Finest Opal Ever' found

Billed as the “finest opal ever,” the Virgin Rainbow made its world debut at the South Australian Museum in Adelaide as the centerpiece of a larger exhibition to commemorate the centenary of opal mining in Australia.
Veteran miner John Dunstan is credited with discovering the Virgin Rainbow in Coober Pedy in 2003.

Dustan has mined opals for 50 years, but the internal fire of the Virgin Rainbow is unlike anything he’s ever seen.

Gibber plain near Coober Pedy
The Virgin Rainbow is a Belemnite pipe, which is essentially an opal that formed in the skeleton of an extinct ancestor of the common cuttlefish.

It is considered a once-in-a-lifetime discovery.
Coober Pedy is called “The Opal Capital of the World.” The discovery of gem opals sparked a rush of mining activity that has generated top-quality gems for more than 100 years.

Australia produces more than 90% of the world’s precious opals.
Between 100 million and 97 million years ago, Australia’s vast inland sea began retreating. As the sea regressed, a rare episode of acidic weather was taking place, exposing pyrite minerals and releasing sulphuric acid.

As the surface of the basin dried further and cracked, silica-rich gel became trapped in the veins of the rock. Over eons, the silica solidified to form opals

Sunday, 13 January 2019

Iconic Cartier

Founded in 1847 in Paris, Cartier stands as one of the world’s most esteemed and respected houses in the luxury goods industry.

Tutti Frutti bracelet sold for $886,822 at Christie’s in 2017

1949 Panther brooch of Wallis Simpson
The Reine Makeda Necklace features a 15.29 carat ruby and a 5.1 carat diamond. Hutton-Mdivani Jadeite Necklace consists of 27 jadeite beads. The preeminent jadeite piece in the world, it sold for $ 27.4m in 2014.

An emerald, pearl and diamond flower brooch sold for $487,500