|The largest known blue topaz stone, owned by philanthropist Maurice Ostro, is displayed to media at the Natural History Museum in London|
Max Ostro escaped death at the hands of the Nazis, braved malaria, and avoided piranha fish in his quest to find beautiful gems.
The stunning 9,381 carat stone will soon be on show in the National History Museum, so experts are unable to give an idea of its value because of insurance reasons.
Ostro discovered the flawless blue stone in its natural form deep in the Amazon rainforest in Brazil in the mid 1980s.
|The largest known topaz stone, is held for photographing before it is made available to view at the Natural History Museum in London|
When Max passed away six years ago, his entrepreneur and philanthropist son Maurice Ostro OBE decided to use the family business to help in his charitable work.