A Very Gorgeous Black Opal Ring

There's not much better for a view of colour than an Opal in the sunshine. 
I love Black Opals, they're much hardier than their white partner, which tends to be very porous and lose their fire when they get into contact with soap or chemicals.
Anyway,  this beautiful 6x8mm Black Opal is set onto a 2mm wide Square Silver Ring and a size R.