Which term describes the surface feature seen at 10x magnification due to growth irregularities and affects transparency?

Which term describes the surface feature seen at 10x magnification due to growth irregularities and affects transparency?

• A. Internal Graining
• B. Inclusion
• C. IndN
• D. HPHT

Answer: (A)

Internal graining is the growth-derived pattern inside a diamond that appears as faint lines or wisps when viewed at higher magnification. These lines form from irregularities in how the crystal lattice grew, and they can reach or be visible near the surface, scattering light and reducing transparency. This is different from an inclusion, which is a foreign material trapped inside the diamond, and from surface features or treatments like indented naturals or HPHT, which are not caused by the crystal’s growth pattern. Because the feature described arises from growth irregularities and directly affects how light passes through the stone, internal graining is the best term.

Internal graining is the growth-derived pattern inside a diamond that appears as faint lines or wisps when viewed at higher magnification. These lines form from irregularities in how the crystal lattice grew, and they can reach or be visible near the surface, scattering light and reducing transparency. This is different from an inclusion, which is a foreign material trapped inside the diamond, and from surface features or treatments like indented naturals or HPHT, which are not caused by the crystal’s growth pattern. Because the feature described arises from growth irregularities and directly affects how light passes through the stone, internal graining is the best term.