Pointed Culet
Pointed Culet
The pavilion termination of modern brilliant cuts, where pavilion facets meet at a true point
A pointed culet is the pavilion termination of a faceted gemstone in which the pavilion main facets meet at a single point rather than at a small flat facet (the open or closed culet). Pointed culets are the standard termination on modern round brilliant, princess, oval, and most other contemporary cuts, and they reflect both improved cutting technique and a different philosophy of light return than the older open-culet conventions of the seventeenth and eighteenth centuries.
Why a point
The pointed termination removes the small flat plane through which an open culet would otherwise transmit light directly out the bottom of the stone. In the older European, mine, and old-cushion cuts, the open culet was visible as a small octagon or flat circle at the bottom of the stone when viewed face-up, often appearing as a soft window or hole through the brilliance. With the pointed culet, no such window appears; the pavilion facets reflect light internally back through the crown, where the cut has been engineered to release it as fire and brilliance.
The trade-off is mechanical. A pointed culet is more vulnerable than a flat culet to chipping during setting, during wear, and during cleaning if the stone is dropped. Setters working with pointed-culet stones must avoid contact between the pointed pavilion tip and metal during seat preparation, and the stone's seat must be cut to avoid pressure on the point. Bezels, prongs, and channel settings all accommodate pointed culets when the seat is correctly engineered, and modern setting technique handles the issue routinely.
Open culets in older cuts
Cuts produced before the late nineteenth century commonly carried open or closed culets — flat octagonal or circular facets at the pavilion termination. The open-culet convention had two reasons. First, cutting a true point reliably required precise pavilion-angle control, which was beyond the routine capability of most workshops before motorised cutting. Second, the open culet eased the setting process by giving the setter a small flat surface to align against rather than a fragile point. The visual window the open culet produced was accepted as the cost of practicality.
Old-cushion, old-European, and old-mine cuts retain open culets in their authentic forms; pieces that have been recut into modern proportions typically lose the open culet in the process. Antique-cut diamonds with open culets are valued in the period-jewellery market for their authenticity and for the soft visual character the culet contributes.
In the trade
Buyers handling modern brilliant-cut stones should expect pointed culets and should evaluate the point under loupe for chipping, abrasion, and pavilion-tip damage. The most common defect at the culet is a small nick or extra facet introduced during setting; a clean point that returns a tight extinction reflection in the polariscope or under a loupe light indicates a stone that has not been mistreated. Antique cuts with open culets carry the open culet as a feature rather than a defect, and the trade values them on their authentic profile rather than against modern brilliant standards.