Thursday, 29 December 2016
Tuesday, 27 December 2016
|Alexandrite undergoes dramatic shifts in color depending on what kind of light it's in. A variety of Chrysoberyl, alexandrite's color-changing properties is due to an exceedingly rare combination of minerals that includes titanium, iron and chromium. Originally discovered in Russia’s Ural Mountains in the 1830s, it’s now found in Sri Lanka, East Africa, and Brazil.|
Fine, gem quality material is exceptionally rare and valuable. Alexandrite's mohs hardness is about 8.5.
Thursday, 22 December 2016
|Cartier Magicien High Jewelry Panthère Asymétrique. The case and bracelet is set with 64 baguette-cut diamonds totaling 8.10 carats, 397 brilliant-cut yellow diamonds totaling 3.22 carats, 186 brilliant-cut orange diamonds totaling 0.83 carats, 315 brilliant-cut diamonds totaling 1.78 carats. In all nearly 1,000 diamonds and 14 carats.|
Wednesday, 21 December 2016
|Sotheby’s sold $29.7 million worth of jewelry at two auctions in New York. A diamond ring from the collection of philanthropist Marjorie Fisher turned out to be the most expensive item. The marquise-shaped, 18.04-carat, D-color, VVS1-clarity diamond fetched $1.8 million, or $102,134 per carat This price surpassed a pre-sale estimate of $1.25 million to $1.75 million.|
A 18.10-carat, D-color, VS1-clarity diamond ring found a buyer for $1.5 million, or $80,249 per carat. Separately, a cushion-cut, 10.19-carat, D-color, internally flawless diamond went for $1.3 million, or $130,765 per carat.
|The Magnificent Jewels sale that took place on Dec. 9 at Sotheby’s New York marks the last jewelry auction of 2015. The auction brought in $52.2 million.|
The top lot was a 25.87 ct. sugarloaf cabochon Kashmir sapphire and diamond ring that sold for $5.1m, exceeding its high estimate of $4.5 million. A diamond necklace created by Van Cleef & Arpels in 1939 for Queen Nazli of Egypt made $4.3 million.
Pair of white gold, chalcedony, sapphire, and diamond cuff bracelets by Suzanne Belperron sold for $526,000
A platinum and diamond brooch by Bvlgari sold for $1.75 million, far exceeding its high estimate of $700,000.
A 38.27 ct. emerald-cut diamond ring sold for $4m
Tuesday, 20 December 2016
The Harrods Diamond is a 228.31 carat pear-shape stone graded G colour with VS1 clarity - a rare specimen and one of the largest diamonds of our times. A quality diamond of over 100 carats is impressive; over 200 carats puts the stone into another league.|
It appears that the stone has been cut recently, suggesting that the diamond that emerged from Harrods was a rough. The size of the rough and its provenance is anyone’s guess. The largest white to recently come to auction is an 118 carat D colour Flawless diamond that broke records in Hong Kong in 2013 when it sold for $30.6 million.
|The incredible colours of rhodochrosite, haüyne, sphene, yogo sapphires, tanzanites, hiddenite, garnets and benitoites at the Los Angeles County Natural History Museum, in the Butterfly Broach Collection.|
This brooch is almost entirely set with benitoite, the California state gemstone.
|A barium-titanium silicate mineral (BaTiSi3O9), benitoite is a rare mineral, crystals large enough to be cut into gemstones are found only in one location: the Dallas gem mine in San Benito County, California. An unusual geologic setting of hydrothermal veins between glaucophane schist and serpentinite created this rare mineral. Benitoite is known for its high dispersion and its vivid blue fluorescence in UV light.|
Orange spessartine garnets from the Little Three mine in Ramona, California highlight this brooch, along with colorless diamonds and green tsavorite garnets from Kenya.
|The multi-colored sparkle of this butterfly emanates from its green titanites (“sphene”) from Madagascar.
The "fire" of titanite derives from its high dispersion and refraction. Titanite (CaTiSiO5) is a fairly common accessory mineral in igneous and metamorphic rocks,
but is seldom found in size and quality suitable for gems.||
This butterfly brooch brings together titanites in three different colors: green from Madagascar, brown and yellow from Pakistan.
A 13.51ct rhodocrosite (MnCO3). This mineral is very rare in jewelry. Apatite and opal cover the wings, the eyes are green chromium-rich titanite (sphene).
|A 10.01-ct green hiddenite is the central piece of the brooch. Hiddenite is a green variety of the mineral spodumene (LiAl(SiO3)2) in which the color is caused by small amounts of the element. chromium. Hiddenite from North Carolina is found associated with emerald, the green variety of beryl, which also owes its color to chromium. The body of this butterfly is the world's largest faceted hiddenite.|
This butterfly brooch is set with blue sapphires from Yogo Gulch, Montana. Sapphire senso stricto is the blue variety of corundum (Al2O3).
Van Cleef & Arpels
Diamond and Gemstone Butterfly Brooch in 18K and Platinum.
Victorian Gemstone Butterfly Brooch
A pearl, diamond and cabochon emerald butterfly brooch by Buccellati.
A carved boulder opal butterfly brooch with diamonds and sapphires.
Fire Opal Butterfly brooch by Shaun Leane.
Anna Hu’s pair of high jewellery earrings.
Van Cleef & Arpels Papillons Butterfly blue and diamond brooch
Van Cleef & Arpels
Graff multi-cut diamond butterfly brooch 119.99 carats
Wallace Chans " Whimsical Blue" Butterfly