That's a big rhinestone glued to the front of the card. Now here's the kicker...and proof of my Dad's sense of humor.
You can just barely make out his "Ernie" signature at the bottom of the Valentine. I do believe that this was the Valentine Dad gave to Mom the month before he proposed...on St. Patrick's Day. I had never seen this card before and I wish I had been able to show it to her before she died. I wonder what SHE thought about it? How could she resist such a "romantic" guy???
Happy Almost Valentine's Day...hug those you love & tell them you love them.