Antique sterling silver and 9k gold Victorian onyx mourning ring

Antique sterling silver and 9k gold Victorian onyx mourning ring. Absolutely stunning piece - signet style inlay of perfect, flawless black onyx with triangular/diamond design of four clear rhinestones (resemble old mine cut diamonds but are not) set in a simple sterling frame with a gorgeous swirly, column like 9k rosy yellow gold band. This is in absolutely perfect condition - not even a scratch on the onyx (very very uncommon) or a bend in the band. Each piece is placed perfectly. Stamped 9ct&silver (stamp design is probably English, also confirmed sterling through acid testing), size 6.5 - 6.75, 3.33g.