Pricing non-white rose cuts for your designs

Hi all,

I’m trying to figure out Geller Blue Book-style pricing for a ring I’m making, but can only find full cut white diamond prices listed. The ring uses 5 total rose cuts, ranging from icy white to flecked salt & pepper to black. Does anyone have any recommendations on a pricing guide or standard for alternative colors and cuts of diamonds?

Thanks in advance for any wisdom.