World’s Largest Opal Sells For $300,000

The world’s largest opal, a fistsized stone from Australia called “Halley’s Comet,” was bought for $300,000 at an auction Monday.

The price was lower than the $1 million hoped for by Sydneybased Pickles Auctions.

Halley’s Comet, a black opal with a blue and green streak, was found in 1985 in New South Wales. It weighs 1,982.5 carats, or 13.8 ounces.

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