Discovered in Brazil in the 80s, these stones are bringing new colour to high jewellery collections In September a ...

Sale prices also have remained elusive. Benitoite is a blue to blue-purple gemstone made of aluminum oxide with magnesium, iron and zinc. It was first discovered in San Benito County, hence the ...

A Thai cleaner working for a Saudi prince took the gems in ... The stones get their colour when the chemical boron is present during formation. The origin of the Saudi blue diamond is unclear ...