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Do they have different values, is white the best or black? Which grade or no. is most valuable?
once I get the money ill buy one to support
Grading Opal what about the GDA™ system is that working ?
When you are grading a stone that hits in between in the middle of the scale, be it brightness or body tone do you usually grade it on the higher end? Or is it just on a stone by stone basis?
stone by stone but usually i grade it down
Where can you get one of those body tone scale charts?
Eric Yang blackopaldirect.com/product/lapidary-tools-guides/opal-bodytone-brightness-scale/
Do they have different values, is white the best or black? Which grade or no. is most valuable?
once I get the money ill buy one to support
Grading Opal what about the GDA™ system is that working ?
When you are grading a stone that hits in between in the middle of the scale, be it brightness or body tone do you usually grade it on the higher end? Or is it just on a stone by stone basis?
stone by stone but usually i grade it down
Where can you get one of those body tone scale charts?
Eric Yang blackopaldirect.com/product/lapidary-tools-guides/opal-bodytone-brightness-scale/