A group of unmounted opals, comprising: a rounded square-shaped opal, measuring 14.8...

A group of unmounted opals, comprising: a rounded square-shaped opal, measuring 14.8 x 13.7 x 2.5mm, weighing 3.89 carats; a pear-shaped 22.6 x 13.2 x 5mm, weighing 9.76 carats; an oval-shaped opal, 14.5 x 10.5 x 4.7mm, weighing 4.46 grams; a pear-shaped opal, 15.2 x 9.4 x 5.4mm, weighing 5.50 carats; and an oval-shaped grey opal, measuring 15.9 x 11.7 x 5.7mm, weighing 7.35 carats (5)