We can select our own diamonds to send to GIA for a master stone report. It’s important to understand that specific requirements have to be met before GIA will accept a stone as a master.
Choosing master stones is a task in itself. Unless you have a lot of contacts in diamond suppliers, finding the prerequisites required for a master stone will be difficult to say the least. There will definitely be a hefty premium on a single or a set of master stones, so be prepared for sticker shock.
- Thick to Extremely Thick Girdles
- Crown heights less than 11%
- Pavilion depths less than 40% or greater than 45%
- Old style cuts
- *Damaged stones or dirty girdles
- Medium to strong fluorescence
- SI2 to Imperfect clarities visible through the pavilion with your naked eye
- Thin to slightly thick girdles (faceted is ok)
- Crown height 12% to 15%
- Pavilion depth 42% to 44%
- Modern round brilliants
- A stone without damage and clean girdle
- None to faint fluorescence
- SI1 or better, without dark inclusions
*Faceted girdles are preferred since gray girdles will collect embedded debris in pits caused in the cutting process leaving behind an unwanted color influence.