This opal has now been set in this ring:
https://earthartgems.com/products/solid-australian-crystal-opal-in-castellated-bezel-ring
Natural semi-crystal opal from Australia
A nice crystal base. A very interesting piece, double sided with a semi transparent section on top, and a more opaque section on the base. Very neon play of color.
Old stock, cut over 30 years ago. No cracks or crazing
Brightness: 4
Video is taken outside, on an overcast afternoon.
Pictures are taken indoors, under diffused fluorescent lights in a lightbox. No post processing.
20.9 x 12.5mm x 2.1mm
3.8 carats