LONDON (Reuters) - A flawless blue topaz gemstone, said to be the largest of its kind, is set to go on display at London's Natural History Museum. The Ostro stone weighs around 2 kg (4.4 lb) and will ...

A blue topaz stone, thought to be the largest-ever, is to go on permanent loan to the Natural History Museum in London. It has been handed over by the family of gemstone pioneer Max Ostro, who ...

I’ve been covering lifestyle content for over seven years. Look for durable gemstone engagement rings, such as those made with sapphires, rubies and emeralds. One thing to keep in mind: Sapphire, ruby ...

Distinguishing Pukhraj (yellow sapphire) from yellow topaz is crucial for astrological benefits and price. Pukhraj, a powerful gemstone for Jupiter, is harder, richer in color, heavier, and ...

LONDON (Reuters) - A flawless blue topaz gemstone, said to be the largest of its kind, is set to go on display at London's Natural History Museum. The Ostro stone weighs around 2 kg (4.4 lb) and will ...

A blue topaz stone, thought to be the largest-ever, is to go on permanent loan to the Natural History Museum in London. It has been handed over by the family of gemstone pioneer Max Ostro, who ...

The largest known blue topaz stone, owned by philanthropist Maurice Ostro, is displayed to media at the Natural History Museum in London, Britain September 27, 2016. REUTERS/Peter Nicholls LONDON - A ...