Which part of a diamond helps in reducing the risk of chipping at the point?

The culet is the facet on the bottom of the diamond, and it serves a specific purpose in terms of durability. A well-formed culet can help reduce the risk of chipping at the point of the diamond, particularly when the stone is set in jewelry or subject to impact. The culet acts as a small surface that diffuses stress away from the point, which is the most vulnerable part of the diamond because of its thin structure. When a diamond experiences pressure or impact, a properly proportioned culet can minimize the likelihood of a chip occurring at this critical point.

In contrast, the crown is the uppermost part of the diamond and refers to the section above the girdle; it does not offer protection to the point. The girdle is the equatorial band around the diamond that provides structure but does not directly influence chipping at the culet. The facets are the flat surfaces that create the diamond's beauty and brilliance, yet they do not specifically address the risk of chipping at the point of the diamond.