Burmese Ruby by JE Caldwell & Co

Legendary jewelery firm JE Caldwell & Co was founded in Philadelphia in 1839 by metalworker James Caldwell Emmott, who made his name in Art Nouveau pieces. But it was art deco jewelry, a striking example of which is a luxurious platinum ruby ​​ring, that became the most outstanding among his works.

So, for example, the ring, which was sold at Sotheby's on February 7 for $290 ($500 more than the highest price, according to experts), according to Sotheby's vice president of the jewelry department, Robin Wright, shows a beautiful Burmese ruby. “Burmese rubies are certainly in short supply on the market,” he says, “so when they come up at auction they tend to sell very well.”

But the stones themselves are not the goal for passionate collectors. "An exceptional ruby ​​coupled with a beautiful setting by JE Caldwell has sparked a competitive spirit among collectors"