Which term describes a well-formed diamond crystal described as transparent and octahedral?

Which term describes a well-formed diamond crystal described as transparent and octahedral?

• A. Girdle thickness percentage
• B. GrCnt
• C. Graphitization
• D. Glassie

Answer: (D)

Describing how a diamond crystal looks and its external form. A well-formed diamond that is transparent and shows an octahedral shape is best described as glassie because this term conveys a glass-like, bright, vitreous luster that aligns with high transparency, while also nodding to the typical octahedral crystal habit diamonds often exhibit. The girdle thickness percentage is just a measurement of the gem’s width around its edge, not its appearance; GrCnt isn’t a standard descriptor; and graphitization refers to a transformation into graphite, not how the crystal appears. So the glassie description most accurately captures both the clear, glassy look and the common octahedral form.

Describing how a diamond crystal looks and its external form. A well-formed diamond that is transparent and shows an octahedral shape is best described as glassie because this term conveys a glass-like, bright, vitreous luster that aligns with high transparency, while also nodding to the typical octahedral crystal habit diamonds often exhibit. The girdle thickness percentage is just a measurement of the gem’s width around its edge, not its appearance; GrCnt isn’t a standard descriptor; and graphitization refers to a transformation into graphite, not how the crystal appears. So the glassie description most accurately captures both the clear, glassy look and the common octahedral form.