I heard that these exist in the trade. On the NADB's (North American Diamond Broker) old website they offered to send interested clients a worksheet to do the valuation at home. The only thing I found online was this rather simple version
http://www.diamondkarma.com/diamond...hape=heart&clarity=IF&natural=natural&lab=GIA
and this more complex calculator
http://www.diamondpriceinfo.com/
The latter has an annoying error however because after using it once or twice it becomes unusable for about 2-3 hours and returns a weird error at least when I'm using it...
What I notice from the Diamond Karma quick plugin sheet is that they seem to regard hearts and trilliants as valuable as rounds?! They also presume the old cuts (Flanders, European, Old Miner) are as valuable as rounds. Surely from everything I heard this must be wrong?
Main question though is if anyone has access to a diamond valuation worksheet and would be willing to share
http://www.diamondkarma.com/diamond...hape=heart&clarity=IF&natural=natural&lab=GIA
and this more complex calculator
http://www.diamondpriceinfo.com/
The latter has an annoying error however because after using it once or twice it becomes unusable for about 2-3 hours and returns a weird error at least when I'm using it...
What I notice from the Diamond Karma quick plugin sheet is that they seem to regard hearts and trilliants as valuable as rounds?! They also presume the old cuts (Flanders, European, Old Miner) are as valuable as rounds. Surely from everything I heard this must be wrong?
Main question though is if anyone has access to a diamond valuation worksheet and would be willing to share