This is one of the rings currently offered as part of our online studio sample sale. It's a beautiful ring created in platinum with a pink sapphire and diamonds. You can see more of the details on the site under the Sale section. It is currently a size 6 and can be sized up or down by about 3/4 of a size. Corundum (sapphire) is a 9 on the Moh's hardness scale. The only stone with a higher rating is a diamond which has a hardness of 10. This makes sapphire a highly durable stone to wear everyday and suitable for an engagement ring.