Absolutely gorgeous 1920s Art Deco era diamond engagement ring

1 large center diamond, and 2 smaller side diamonds on each side. Diamonds are set in a beautiful 18k white gold filigree band.
0.50 carat and 18k white gold

This ring is just stunning, and catches the light and sparkles so unbelievably well!

Condition
Band in the back has worn thin, and split in the middle [see last photograph].
Upon inspection by a jeweler, I was also told there is a small chip or crack to the diamond, but it is not visible to the naked eye.