Reference:


ABOUT OPALS

 

What is a Light Opal ?

 

 

Light Opal – is the family of opal which shows a play-of-colour within or on a light body tone, when viewed face-up (See figure 5C), and may be designated N7, N8, or N9 on the Scale of Body Tone. The N9 category is referred to as white opal (See figure 1).

N1 - N4
N5 - N6
N7 - N9
Black Opal
Dark Opal
Light Opal

 

Light opal
White or light appearance.Most abundant and affordable
Usually South Australian fields though some from other areas

Find more information at the OPAL Association's Opal Nomenclature Section of their Website:

http://www.opal.asn.au/information_nom