This is a K18PG ring with diamonds and blue topaz. As shown in the second image, one of the blue topaz stones is missing, so this is for someone who can have it repaired. I don't think it has been used much. I am not a professional, so please understand that this is a used item, and I cannot accept returns. It is stamped with "750" and "0.06". I don't remember the size, so I've uploaded an image with a ruler. Thank you.