Which term describes the girdle thickness expressed as a percentage of the average girdle diameter?

Which term describes the girdle thickness expressed as a percentage of the average girdle diameter?

• A. Girdle thickness percentage
• B. Glassie
• C. Gletz
• D. Glide plane

Answer: (A)

Girdle thickness expressed as a percentage of the average girdle diameter is called the girdle thickness percentage. This measure shows how thick the girdle is relative to the overall diameter, giving a dimensionless value that helps graders categorize girdle width without relying on absolute millimeter values. You calculate it by dividing the actual girdle thickness by the average diameter and multiplying by 100. For example, a girdle thickness of 0.9 mm with an average diameter of 6.0 mm yields 15%. This descriptor is standard in grading reports to indicate whether the girdle is extremely thin, very thin, thin, medium, thick, or very thick. The other terms aren’t used to describe girdle thickness in this way—glide plane relates to crystal structure, and the remaining terms aren’t established vocabulary for girdle thickness.

Girdle thickness expressed as a percentage of the average girdle diameter is called the girdle thickness percentage. This measure shows how thick the girdle is relative to the overall diameter, giving a dimensionless value that helps graders categorize girdle width without relying on absolute millimeter values. You calculate it by dividing the actual girdle thickness by the average diameter and multiplying by 100. For example, a girdle thickness of 0.9 mm with an average diameter of 6.0 mm yields 15%. This descriptor is standard in grading reports to indicate whether the girdle is extremely thin, very thin, thin, medium, thick, or very thick. The other terms aren’t used to describe girdle thickness in this way—glide plane relates to crystal structure, and the remaining terms aren’t established vocabulary for girdle thickness.