How much is a 15 carat diamond ring?

The closest we can come to finding such a diamond for sale online is for a 14.03 carat diamond, currently priced at US$781.608. This is an F colour, round cut with clarity of SI1.

This calculates to US$55,710 per carat.

Can you do the math for a 15 carat diamond?

If you want to purchase another gem stone, your price would be different.

Also, the metal, design and setting would be an additional expense.