Price of Old mine cuts?

[Brimo]

Hello, I am brand new to this forum, and I am currently searching for a 1.30 - 1.50 OMC SI1 clarity, G or H in color. I was wondering what type of price point I would be looking at and whether or not there are any internet resources that I could use to find a nice OMC. I have two 40 pointer OMCs from my grandmother''s ring, and I want to incorporate these into my an engagement ring with the 1.30 to 1.50 OMC in the center. Looking forward to any input that you may have.

Best Regards,
Brian

 

[DiamondExpert]

Roughly $2500-$4500/ct. Prices vary widely.