Top best answers to the question «What is the best quality opal»
Opals vary widely in price depending on their variety and quality. Black opals are the most prized. These gems have a black or dark blue background and show their play of color most vividly. Prices for fine to extra fine quality gems usually range from thousands to tens of thousands of dollars per carat.
Black opals are generally considered to be the best in the world due to their dark body tone. Boulder opals are the much lesser known cousin of the black opal, but they can have equally stunning colour.