Those vendors have crown and pavilion angles either on their websites or using direct data feed. It is also not a free service. Vendors who list their diamonds pay for advertising.----------------
Why does the diamond search on the pricescope home page seem to be limited to a few vendors?
----------------
SuperbCert doesn't advertise on Pricescope and I'm afraid never will (it is my personal decision).----------------
For example, I have yet to see SuperbCert diamonds show up.
----------------
As far as I know Jim just arranged with one of his supplier to have a data feed with known crown and pavilion angles for about 50-60 stones.----------------
Conversely, Dirt Cheap Diamonds shows up under the search, yet when I go the website, I can't find the crown and pav angles.
----------------