Around his neck, on a heavy gold chain, he wore a finely made amulet, adorned with the largest, most brilliant black opal Fiona had ever seen.

The largest black opal in the Smithsonian Museum comes from the Royal Peacock opal mine in the Virgin Valley.

Glorious Jubilee is the world's largest black opal from Lightning Ridge of Australia; the opal weights 775 carats with Gray base multi colors.

On her right hand Someryn wore a large white opal that flashed caverns of red whenever she adjusted her shawl, and a long blue sapphire surrounded by rubies on the left.

The next circle is of more slightly larger opals alternated with an opaque, whitish stone streaked irregularly with a bright green.

The Galaxy is the world's largest polished opal, certified by the Guinness Book of World Records in 1992.

Deeper in the tunnel, he finds a large opal which he takes back to Kellyanne.

The Olympic Australis Opal is the largest and most valuable opal yet found, valued at A$2,500,000.

The Halley's Comet Opal is the largest uncut black opal in the world, according to the Guinness Book of World Records.

Charlie Dunstan in 1908 found two large opals the "Fire Queen" and "Queen of the Earth", at the Angledool diggings.