What grade is Turkey's Bursa Green Onyx?
Bursa Green Onyx is not typically graded using the same system as a school grade. Instead, it is classified based on its color, pattern, and quality. Onyx is generally categorized as first grade, second grade, and commercial grade, with first grade being the highest quality. The specific grade of Bursa Green Onyx may vary depending on the supplier and their assessment of its quality.








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