Chromium gives alexandrite its color and while in most minerals a trace element like chromium would provide only one color to the mineral, in alexandrite it gives it two! Coloring agents are dependent on the wavelength of light and the chemical bonds in the crystal to determine the color that they will cause. An element like copper, in normal light, can cause a green color in malachite and a blue color in azurite, it all depends on the character of the chemical bonding. In a single specimen of alexandrite, the chromium is in such a balanced situation that the color of the specimen depends on the character of light that hits the crystal. If the light is natural sunlight or fluorescent light, the crystal will be green; however, if the light is incandescent light from a common indoor light bulb, then the crystal will appear red.
India’s rich ties to fine jewelry, diamonds and gemstones, he explained, is partly the result of natural circumstances. The mines of Golconda yielded the highest grade of diamonds. Kashmir produced the rarest and most beautiful sapphires. And the greatest emeralds arrived in India from Colombia through commercial exchange via the Portuguese-controlled ports of Goa. On the cover of the Maharajas & Mughal Magnificence catalog is a Belle Époque "jigha" (turban ornament) dripping with old-cut, baguette and pear-shaped diamonds. The Indian royal treasure (photo above), which was originally designed in 1907 and remodeled circa 1935, would have been worn on formal occasions by a Maharaja, explained Kadakia. The ornament is estimated to sell in the range of $1.2 million to $2.2 million. Christie's sale includes two spectacular diamonds sourced at India's Golconda mine.
The diamond mining company has promised a $3,000 cash prize and a tour of the mine to the Botswana citizen who comes up with the best name for a grey-black diamond crystal that has the distinction of being the second largest rough diamond ever discovered. Only the 3,106 carat Cullinan, discovered in South Africa in 1905, was larger. The name must be in Setswana, the national language of Botswana, according to the official rules. Entrants must state why they chose that particular name, the meaning of the name and what the chosen name signifies. The competition runs through June 14. The winner will be honored at a gala dinner, where the grand prize will be presented.
Though the pearl eludes me while I'm sinkin' still there's no finer thing Diamonds do you justice only 'cause your beauty shines like a ring Fighting through the winter tempest I can hear the sea sirens sing I want you more than everything