Guys, DOES IT LOOK LIKE MY EX OF 12 YEARS IS ENGAGED OR COULD IT BE A PROMISE/COMMITMENT RING?

I was with my ex for 12+ years and we split about 3 years ago. We split because I cheated on her, she was travelling all the time and I was depressed so ended up having a stupid one night stand.

She’s Russian and her new man is some stupid Russian millionaire.

we follow each other and still hang out occasionally but she posted this picture today, I don’t know how to take it?
Guys, DOES IT LOOK LIKE MY EX OF 12 YEARS IS ENGAGED OR COULD IT BE A PROMISE/COMMITMENT RING?
Updates
+1 y
I AM A MALE DONT KNOW WHY MY PROFILE SAYS FEMALE
Guys, DOES IT LOOK LIKE MY EX OF 12 YEARS IS ENGAGED OR COULD IT BE A PROMISE/COMMITMENT RING?
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