This is a great estate Heart Diamond Pendant. It is from the 1970's and is 1" without the bale by 7/8". There it is next to a penny. It has a large bale which would accommodate a chain or ribbon.
The pendant has @ 1CT of well matched Diamonds and weighs 3.6 grams. It is hallmarked 14K and has been lovingly worn. Better than newer pendants and the sentiment cannot be missed.