Argyle diamonds, uplifted by pressure to the earth’s surface where they absorb light and acquire the structure creating their special pink quality, come from the Argyle Diamond Mine, owned by Rio Tinto in Western Australia. Over 90% of the world’s pink varieties—red, pink, purplish pink, pink rose, pink champagne, and blue violet—come from this mine and are unlike pink diamonds from any other source. Although the mine produces plenty of pink diamonds each year, only a handful weigh more than half a carat. The clock is ticking for the mine—2019 is its expected closing-date, making it worthwhile now to buy Argyle diamonds.
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