Item Type: SOLID NATURAL BLACK OPAL GREY BASE

LIGHTNING RIDGE AUSTRALIA

OPAL Size: 13 X10X4 MM

UNTREATED

Weight (Carats): IN HEADER

Colour :

Pattern : BROADFLASH

Number of pieces: 1AS PER IMAGES

Accuracy of picture :

+  More Bright Accurate Less Bright

Comments :

Brightness Rating, 1 Dullest to 5 Brightest : 3.5 BRIGHTNESS

++++++ 1 2 3 3.5 4 4.5 5

Opal body tone as recommended by Australian Gemstone Association Ltd : N3

+     

Base of opal (bottom) :

+ + Full opal Clean back Some Sand Majority Sand

Cabochon :

+ Low Medium High Definitions

Convert Weight : 5 Carats = 1 Gram Covert Size : 6 mm = 1/4 inch (approx)