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Giant 152lb emerald valued at $168m sells for just $8m at auction
A stunning raw uncut emerald was auctioned in Salvador in the Brazilian state of Bahia on Wednesday. The giant 152-pound stone was mined in Pindobacu, known as the 'City of Emeralds'. Despite an ...
Rubies and emeralds get their colours from a common metal
Both rubies and emeralds are minerals, which is a type of rock with a consistent chemical composition and a highly ordered ...