... the black opal is sometimes more valuable than the diamond if their weight is the same...
... the opal was considered the favourite gemstones by the royals in the 19th century and that it was among queen Victoria's favourite gemstone (1819 - 1901)...
...just 0,25% of the total amount of opal mined can be classified as high quality precious opal...
... the opal is the gem that represents Australia, Mexico, Honduras...
... during the 20th century the opal mining industry was considered one of the most powerful forces that brought toghether the multicultural Australian nation...
... is the gem of those were born in October...
... is the gem bought to celebrate both your 18th and 21th wedding anniversary...
