Calibrated Australian Opal Stones
Calibrated Australian opal stones are cut and polished to exact, standardized dimensions to fit standard commercial jewelry mounts seamlessly. Sourced primarily from the light crystal fields of Coober Pedy, these stones save jewelry designers significant time and custom metalwork costs. Every calibrated opal is guaranteed natural and solid.
Filters
High Precision Gems for Commercial Designs
These stones fit perfectly into pre made jewelry mounts without requiring expensive custom lapidary work. Popular sizes include 8x6mm, 10x8mm ovals, and 6mm rounds. Review our payment options page for checkout convenience.
Frequently Asked Questions
What is a calibrated opal?
It is an opal cut to precise, standardized measurements to fit standard jewelry castings.
Are calibrated opals lower quality?
No, calibrated stones are crafted in various grades from standard to premium gem quality.
What sizes do calibrated crystal opals come in?
They commonly come in oval sizes of 6x4mm, 8x6mm, and 10x8mm, and rounds from 4mm to 8mm.