These include iron for yellow to orange to brown (fire opal), copper for a saturated blue (“Peruvian opal”), and nickel for green (chrysopal; Fritsch et al., 1999). Other causes of color in the ...

Forbes contributors publish independent expert analyses and insights. Kate Matthams Spencer is a Paris-based writer who covers jewelry.

The World Jewellery Confederation (CIBJO), the American Gem Trade Association (AGTA) and the International Colored Gemstone Association (ICA) issued a joint statement earlier this week. The statement ...

A 32-year-old man from Texas is accused of two felonies after allegedly stealing diamond earrings from a jewellery in an Orlando shopping centre. According to various media reports, the man allegedly ...