A 50-year-old Brooklyn woman was reunited with her long-ago-stolen high-school class ring after cops arrested a man trying to pawn it Wednesday in Brooklyn, police say.

Belinda ­Alston’s Norman Thomas HS Class of ’82 ring was stolen in 1988.

Police recovered the engraved ring after Luis Baez, 60, of Queens, allegedly ­attempted to get cash for it at a Brooklyn pawn shop.

Baez was charged with criminal possession of stolen property, police said.