Which term describes a flat, triangular twinned diamond crystal?

Which term describes a flat, triangular twinned diamond crystal?

• A. Luster
• B. Macle
• C. London Diamond Syndicate
• D. Lot price

Answer: (B)

A macle describes the crystal form produced when diamond crystals twin along a plane, resulting in a flat, triangular, tabular shape. In diamond morphology, twinning creates distinct, flattened forms, and a macle is the term used for this specific flat, triangular twin crystal. Luster is about how light reflects off a surface, not the crystal’s shape; London Diamond Syndicate and lot price are unrelated to crystal form. So, the best term for a flat, triangular twinned diamond crystal is macle.

A macle describes the crystal form produced when diamond crystals twin along a plane, resulting in a flat, triangular, tabular shape. In diamond morphology, twinning creates distinct, flattened forms, and a macle is the term used for this specific flat, triangular twin crystal. Luster is about how light reflects off a surface, not the crystal’s shape; London Diamond Syndicate and lot price are unrelated to crystal form. So, the best term for a flat, triangular twinned diamond crystal is macle.