Topping the list is the Pink Star Diamond ... its fiery red hue and extreme scarcity can drive prices to over $10,000 per carat. This chameleon-like gemstone is famed for its color-changing ...

Narrator: High-quality black opal can cost over $10,000 per carat, making it one of the world's most expensive gemstones. But mining black opal isn't easy. After investing tens of thousands of ...

At around 10 AM, it was trading at Rs 86,069 per 10 grams - 0.07 per cent higher than the previous close of Rs 86,010.