This is a vintage, Mid Century pair of Coro deep pink Rhinestone earrings in a flower pattern with gold tone metal backing.  The vintage earrings are screw back, clip-on and are marked "Coro" on the back.  The brand was popular in the 1930s, but doesn't appear to have had the name Coro until 1943.  The New York jeweler was known for their "romantic" pieces often designed in the shape of flowers.  The company went out of business in the 1970s.  Based on the style, mark and backing, best guess on a date for this pair is the 1940s to 1950s.  The lovely earrings are in great shape with all rhinestones in place and screw back still easily rotating.  I purchased the pair more than 30 years ago in a vintage shop.  They measure about 1" round.