4.03-carat diamond earrings in sparkling trillion cut Invisible huggie-style clasp Timeless appeal from New York City–based designer ...

The trillion, an existing triangle cut, represents just 5% of the global market. Some occur in nature, but to cut them involves a lot of wastage and the result often lacks brilliance.

One standout among the lot is a 22.46-carat E-color diamond ring thought to be worth $1.8 million. The ring is set with a modified rectangular-cut diamond flanked on either side by a trillion-cut ...