When using masterstones, how should they be applied and what condition must be met?

When using masterstones, how should they be applied and what condition must be met?

• A. The set of masterstones should be matched to the specific color grading requirements of the user
• B. Masterstones must be kept in a drawer; the diamond can be dirty
• C. Masterstones determine price; cleaning is optional
• D. Masterstones are used for display only

Answer: (A)

Masterstones provide a known color reference that anchors your color judgments under controlled lighting, so your grading stays consistent over time and across observers. Because grading standards and lighting can vary between labs or individuals, the set of masterstones you use should be matched to the color grading requirements you follow. In practice, this means selecting a masterstone collection that aligns with your chosen scale (for example, the D-to-Z color range) and keeping that reference framework stable in your workflow. They should be clean and readily accessible, and you should grade under the same lighting to ensure reliable comparisons. The diamond you’re evaluating should also be clean, since dirt or residues can alter perceived color. The other statements don’t reflect how masterstones function: they aren’t for display or for determining price, and while cleanliness matters, the emphasis is on using a properly matched, clean reference set under consistent conditions.

Masterstones provide a known color reference that anchors your color judgments under controlled lighting, so your grading stays consistent over time and across observers. Because grading standards and lighting can vary between labs or individuals, the set of masterstones you use should be matched to the color grading requirements you follow. In practice, this means selecting a masterstone collection that aligns with your chosen scale (for example, the D-to-Z color range) and keeping that reference framework stable in your workflow. They should be clean and readily accessible, and you should grade under the same lighting to ensure reliable comparisons. The diamond you’re evaluating should also be clean, since dirt or residues can alter perceived color. The other statements don’t reflect how masterstones function: they aren’t for display or for determining price, and while cleanliness matters, the emphasis is on using a properly matched, clean reference set under consistent conditions.