I. Reinheit

IF =internally flawless = Lupenrein

VVSI = very very small inclusions = Sehr sehr kleine Einschlüsse

VSI = very small inclusions = Sehr kleine Einschlüsse

SI =small inclusions = Kleine Einschlüsse

P1 = 1st pique = Deutliche Einschlüsse 

P2 = 2nd pique = Größere Einschlüsse

II. Farbe

R - River - hochfeines Weiß

TW - Top Wesselton - feines Weiß

W - Wesselton - Weiß

III. Schliff

Very good - Sehr gut

Good – Gut

Medium - Mittel

Poor - Gering