Which term refers to lines, angles, or curves that might appear whitish, colored, or reflective at 10X magnification due to irregularities in crystal growth?

Which term refers to lines, angles, or curves that might appear whitish, colored, or reflective at 10X magnification due to irregularities in crystal growth?

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

Answer: (C)

Growth-origin lines that show up as whitish, colored, or reflective at 10x come from irregularities in the diamond’s crystal growth. These internal grains form when the crystal lattice develops slight orientation or density variations as it forms, causing light to interact differently along those internal planes. Because they are inherent to the crystal itself, they’re considered internal graining rather than a foreign inclusion. That’s why this term best fits the description. Inclusions are foreign materials inside the stone, an Indented Natural is a surface girdle feature, and HPHT is a treatment process—not a growth-related internal line.

Growth-origin lines that show up as whitish, colored, or reflective at 10x come from irregularities in the diamond’s crystal growth. These internal grains form when the crystal lattice develops slight orientation or density variations as it forms, causing light to interact differently along those internal planes. Because they are inherent to the crystal itself, they’re considered internal graining rather than a foreign inclusion. That’s why this term best fits the description. Inclusions are foreign materials inside the stone, an Indented Natural is a surface girdle feature, and HPHT is a treatment process—not a growth-related internal line.