Yesterday we blogged about a magnificent diamond auction at Sotheby's in New York. Today we turn our attention to a jewelry, diamond and gemstone auction at Christie's An extraordinary ruby and emerald once owned by philanthropist Jessie Ball du Pont, the wife of American industrialist Alfred Irénée du Pont, highlight two high-profile lots at Christie’s Magnificent Jewels sale in New York today. "The Du Pont Ruby" is set in an elaborate platinum and 18-karat gold brooch that's expected to sell in the range of $3.5 million and $5.5 million. The cushion mixed-cut Burmese ruby weighing 11.20 carats is mounted in the center of a heart formed by rectangular and trapezoid-shaped emeralds, as well as French, old and marquise-cut diamonds. Dangling at the sides and bottom of the brooch are five natural saltwater pearls.
"The Indian Blue," a 7.55 carat fancy deep grayish-blue diamond, will be the top lot at Sotheby's Magnificent Jewels sale in New York City today. Described as the "property of a distinguished lady," the cushion-cut center stone has a SI2 clarity and is flanked by two shield shaped diamonds in a ring that carries a pre-sale estimate of $6 million to $8 million. Trace amounts of the chemical element boron are responsible for causing the coloration of natural blue diamonds. According to the Museum of Natural History, “less than one boron atom per million carbon atoms is sufficient to produce the blue coloration.” Also scheduled to hit the auction block at Sotheby's today is a ring featuring an ultra-rare 1.38 carat fancy red diamond. Fancy reds so rare that a typical Argyle Pink Diamonds Tender releases only four, or so, per year. Rio Tinto's Argyle Mine in Western Australia, the primary source of red and pink diamonds, is scheduled to cease operations in 2020, so supplies of these beautiful red diamonds are expected to become even more scarce.
Turkey's a-cookin' and candy cane sticks, With reindeer and sleigh bells and good old Saint Nick Two kids sneakin' kisses beneath all the mistletoe, As if we didn't know! This year, we shall know a wonderful Christmas And the glow of candlelight Let's have a fling! I'll give you my present, a wedding ring! Hear me sing.
December's birthstones have traditonally included turquoise, blue zircon and blue topaz. Tanzanite, the newest gemstone for December was added in 2002. Between its deep blue color and its limited supply, tanzanite is treasured by many, even if your birthday is not in December. It was in the late 1960s when the marketing team at Tiffany & Co. got its first peek at a stunning new gemstone. The intense blue-violet gem had been discovered in the foothills of Mount Kilimanjaro in Tanzania by a Maasai tribesman named Jumanne Ngoma. At first glance, the specimens appeared to be sapphires, but the Gemological Institute of America revealed that the crystals were a never-before-seen variety of zoisite.