How much value is Princess Diana's engagement ring worth?

Well i am only a girl under the age of 21 and i believe it is worth around 50,000 to 100,000 dollars, because she is dead and she married a very rich person so i believe it is very expensive and she is a queen so yes.

Her ring costed $65,000, but this was around 1980. Today, if you were to buy a replica, you pay anywhere around 70 or 80 thousand dollars. Also, just bc it belonged to Lady Diana and Kate Middleton, its probably worth hundreds of thousands of dollars.