Opal bodytone and brightness scale
Sick of trying to guess what the body tone and brightness of your opal is? Now you can accurately measure from a calibrated scale.
This scale has been created with a durable plastic material and is compact to ensure you can take it anywhere. It will help you grade your opal with ease - only to be used as a guide. The body tone(N) values have been measured by Anthony Smallwood – the author of the official grading system used worldwide. The brightness is simplified into 5 levels to support the measure of an opals brightness(B). It also has a millimeter measurement down the side to measure your opal when grading them.
Instructions are on the scale. Opals not included.
Details
- SKU BT001
We offer a 30-day, no-questions-asked returns and money-back guarantee on most ready-made items.
We dispatch all Australian orders via Auspost Express and international orders via DHL or FedEx, complete with tracking, insurance, and clear customs documentation for a smooth delivery experience.
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