The natural white topaz rough stone is used to remedy stress, anxiety, and restlessness. Genuine white topaz might even relieve migraines, headaches, and issues with nasal cavities, skin, and nails.

At 9,381 glittering carats, the Ostro stone is being called the largest topaz of its kind. The electric blue, oval-cut stone is nearly six inches long, 4.5 inches wide, and weighs nearly 4.5 pounds.

The Ostro stone will be exhibited on permanent loan from Maurice Ostro OBE, and remains part of the Ostro Topaz™ blue topaz collection. The original rough material that the gemstone was cut from was ...

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 ...

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 be exhibited from ...