I heard her say she saw the Diana Ross Central Park performance in the rain.
She called Mrs. Ross people and had two questions what mascara she used and what was the weight of the diamond studs.
Oprah stated she purchased 10cts based on Diana Ross.
She stated that that was wrong and she could have saved a lot of money.
So looks like 5 carat per ear for Ms. Oprah.
Side Note: Sorry I do not know how to post large photos on this forum.