About this 3D model

Spreadsheet based tool to help convert Diamond Weight in carats to Girdle Diameter in mm for various cut shapes using best fit lines based on average diamond dimensions found here http://d.neadiamonds.com/diamond-caratPotentially very useful when combined with the following:Ring metal cost calculator http://www.thingiverse.com/thing:12589Ring Creation Script http://www.thingiverse.com/thing:12448Ring Size System Coversion http://www.thingiverse.com/thing:12689for costing a custom engagement ring or other such tomfoolery.