Home WomensFashion A Highly Unusual Eternity Ring, circa 1910. This unique antique engagement ring from the early 1900s is designed as two interlaced stylized triangles set with calibre cut rubies and rose cut diamonds in platinum topped gold milgrain settings. The triangles form an openwork six pointed star held by a three wire rose gold band. The center of the star is accented with an old European cut diamond (approx 0.15 ct). A very elegant Belle Epoque engagement ring.