A nice cantera opal from Mexico with a good solid patch of precious opal right in the middle of the matrix. This could also be called a boulder opal.

Summary:
Weight: 4.25 carats
Size: 9.8mm x 14.2mm x 5.5mm
Polished with a flat back.
100% natural stone, no treatments or backing.

Ready to ship, you'll receive the exact stone pictured