Top 10 Gemstones Found in Brazil
90% of aquamarine in the world is mined in Brazil
Brazil is the largest source of imperial topaz in the world and imperial topaz is the most valued topaz (the image shows it)
The image even shows a great specimen from Brazil - a rough chrysoberyl crystal.
Chrysoberyl is the 3rd hardest gemstone after diamond and sapphire, with hardness at 8.5 out of 10. Not to mention that chrysoberyl can form a "cat's eye" - something that chrysoberyl does best among all the gems.
It's bi-colored Tourmaline with red and green zones in one single crystal. It really looks like a watermelon
Mohs scale hardness - 8/10 (very good)
Almost every color of tourmaline can be found in Brazil.
(aka Rubellite Tourmaline)
Rubellite is the pink to red variety of Tourmaline
It's pretty soft though 5.5/10