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