The entire Asha stone is coated.
Asha is coated in a two-pass process, one pass for the bottom and one pass for the top.
This results in the amorphous diamond completely encasing the inner core CZ.
Please note that version 6 stones have both an optical enhancement layer and then the amorphous diamond layer.
Is the entire Asha stone coated, or is it just the top only?
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