Nice multicoloured dark ironstone with picture patterns and green blue and one or two red opal sparkles. I can see a kookaburra in the patterns. Opal measures approx 13mm x 10mm.  Inside diameter of band is approx 11.5mm. Around a US size 6

Set in sterling silver with an adjustable band this lovely piece of Koroit matrix opal will make a stunning ornament for anyones finger. Flashes of green blue and a few flashes of red also. Opal measures approx 16.5mm x 10.5mm.  Inner measurement of ring band is 17mm which can be expanded. Approx a size US 6

Dark ironstone with patterns of blue green opal and potch, bezel set in sterling silver. Opal measures approx 14.5mm x 8mm. Inside diameter of ring is approx 18mm. Ring size US 71/2 - 8

There is a small pit in the front of the stone which blends in really well with the busy pattern in this piece of Koroit opal. (it can just be seen top left of thumbnail photo). Quite stunning intricate patterns with a few green and blue/purple flashes. The opal and setting around it measures approx 23mm x 15mmx 6mm. Inside diameter of ring is approx 19.5mm

A quite unusual and unique ring. .Inside diameter of ring is approx 18mm.  Opal measures approx 21mm x 10.5mm  9mm high

The opal in this ring measures approx 19mm x 6mm. Measurement of the ring including the setting is 22mm with a nice wide band near the opal, tapering down to 6mm at the back of the ring.  Inside diameter of ring is 17mm (11/16 inch)

A beautiful long elegant ring with lots of sparkling green opal through the brown ironstone. Opal measures approx 26mm x 11mm. Inside diameter of ring is 17.5mm. Approx size US 6.5

A beautiful piece of opal with bright rolling flash of blue and green bezel and dark ironstone set in sterling silver. Opal measures approx 9mm x 5mm.  Inside diameter of ring is 17.5mm. Around a 7.5 US size.

Wow, This is a beautiful ring with medium to dark brown ironstone laced with lots of sparkling opal predominately  green with gold and the occasional flicker of purple/blue. More sparkle than shows in the photos. Opal measures approx 26mm x 17mm.  (including setting is 31mm x 23mm)  Inside diameter of ring is 20mm x 17mm.  Ring size approx US 5.5

A lovely elegant free form opal with sparkling pink opal set in Sterling Silver. Opal measures approx 11.5mm x 10mm. Inside diameter of ring measures approx 19mm.

Opal wood replacement with mauve blue green sheen which deepens when placed on your finger. This is a really beautiful piece. Opal measures approx 16mm x 10.5mm. Inside measurement of band measures approx 19mm.