Until recently, Russia was the only known source of the gem, but East Africa, Brazil and Sri Lanka all now mine Alexandrite. The stone is known for its remarkable ability to change color from ...

Brazil is currently the largest producer of natural topaz, although there are also topaz mines in ... $14.2 million.

Alexandrite was initially discovered in Russia's Ural Mountains in the 1830s. Today, the gemstone is primarily mined in Brazil, Sri Lanka and East Africa. The pearl is June's second birthstone.

Discovered only in the 1830s, Alexandrite is the rare gemstone with a remarkable ability ... Getty Images Thought to be found in only three mines in the world, these intensely colored blue ...

The amazing color-changing stone alexandrite was discovered in 1830 ... might fetch as much as $70,000 per carat. Benitoite is mined only in one small area of California near the San Benito ...

Though there were instances of illegal mining in some ... special precious province of gemstones," said Prof Kasipathi in the paper. He added that the mineral 'alexandrite' must have formed ...