Which term refers to a diamond on which the table has been polished parallel to a dodecahedral plane?

Which term refers to a diamond on which the table has been polished parallel to a dodecahedral plane?

• A. Three-point diamond
• B. Total depth percentage
• C. Two-point diamond
• D. Transmission

Answer: (C)

The table’s orientation relative to the diamond’s crystallographic planes is what this term captures. When the table is cut parallel to a dodecahedral plane, the diamond falls into a specific symmetry pattern historically described as a two-point diamond. The idea behind the name is that two symmetric points (aligned with that dodecahedral plane) define this exact orientation, giving it the distinctive two-point characteristic. This differs from a three-point diamond, which would reflect a different symmetry alignment, and from terms like total depth percentage or transmission, which describe measurements of depth or optical behavior rather than how the table aligns with crystallographic planes.

The table’s orientation relative to the diamond’s crystallographic planes is what this term captures. When the table is cut parallel to a dodecahedral plane, the diamond falls into a specific symmetry pattern historically described as a two-point diamond. The idea behind the name is that two symmetric points (aligned with that dodecahedral plane) define this exact orientation, giving it the distinctive two-point characteristic.

This differs from a three-point diamond, which would reflect a different symmetry alignment, and from terms like total depth percentage or transmission, which describe measurements of depth or optical behavior rather than how the table aligns with crystallographic planes.