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The four diamond criteria, grading reports, natural and laboratory-grown stones.
A grading report is a diamond's biography. Seven lines on it set the stone's value and let you confirm it is the one you bought.
The two share a structure but differ in origin, price and resale value. Kim Bảo Minh Châu states the type on every document.
The two centre stones of the Bright Pearl collection differ in hardness, treatment and wear. Four criteria for choosing the right coloured stone.
