Girdle
The narrow band around a diamond's widest point, separating the crown from the pavilion.
Definition
The girdle is the thin perimeter edge that defines a diamond's widest point, dividing the upper portion (crown) from the lower portion (pavilion). It can be faceted, polished, or bruted (rough). The girdle's thickness, graded from Extremely Thin to Extremely Thick, affects both the diamond's durability and its visual proportions. Laser inscriptions of certification numbers are typically placed on the girdle.
Why It Matters for Ring Design
Girdle thickness directly impacts setting security — extremely thin girdles are prone to chipping, while extremely thick girdles add hidden weight without increasing face-up size. Understanding girdle grades helps jewelers recommend well-proportioned stones and choose appropriate setting styles.
Related Terms
Turn Knowledge Into Sales
Use your expertise to help clients build their dream ring with Ring Vision AI.
Start Free Trial