Treatment that involves injecting molten glass into surface-reaching feathers or laser drill-holes is known as?

Treatment that involves injecting molten glass into surface-reaching feathers or laser drill-holes is known as?

• A. French tips
• B. Fluorescence
• C. Fracture filling
• D. Girdle thickness

Answer: (C)

Fracture filling is the treatment described here. It involves injecting molten glass (or resin) into fractures that reach the surface of the diamond, including cracks opened by laser drilling. The aim is to fill these cracks so they’re less visible and the diamond appears clearer. Because the filling changes the internal structure, it can be detectable under magnification and may affect value, and disclosures are typically required. The other terms don’t describe this process: fluorescence is about UV light response, girdle thickness is a measurement of the diamond’s edge width, and French tips refer to a facet style, not a treatment.

Fracture filling is the treatment described here. It involves injecting molten glass (or resin) into fractures that reach the surface of the diamond, including cracks opened by laser drilling. The aim is to fill these cracks so they’re less visible and the diamond appears clearer. Because the filling changes the internal structure, it can be detectable under magnification and may affect value, and disclosures are typically required. The other terms don’t describe this process: fluorescence is about UV light response, girdle thickness is a measurement of the diamond’s edge width, and French tips refer to a facet style, not a treatment.