Opals

 

TypeSolid - Boulder - Assembled
Base ColorBlack - Semi-Black - Black Crystal - Crystal - Semi-Crystal
White or Gray - Orange - Other - Jelly - Boulder Black
Boulder Brown - Boulder White
CaratLoose - Mounted
MeasurementsLength - Width - Depth
CutFaceted - Cabachon
ProportionsExcellent - Very Good - Good - Fair - Poor
PolishExcellent - Very Good - Good - Fair - Poor
Fire Brightness1 = Faint
2 = Dull
3 = Bright
4 = Very Bright
5 = Brilliant
Fire ColorRed - Yellow - Orange - Blue - Green
Fire TypePinfire - Flashfire - Broad Flashfire
Rolling Flashfire - Harlequin
Eye Grade
ClarityF.I. - Free of Inclusions
L.I. - Lightly Included M.I. - Moderately Included H.I. - Heavily Included