Largest black opal

According to Official Guinness Records,

The largest black opal weighs 11,340.95 carats (2,268.19 grams;80 oz) and measures 2,450 x 1,460 x 527 mm (96.45 x 57.48 x 20.74 in). It is owned by Dallas, Judith, Shannon, Jeffery and Ken Westbrook (all Australia).
The black opal was found in Lightning Ridge, New South Wales, Australia.

For a complete list of 2011 records, please visit 2011 Guinness Records in Australia.

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