This is a 190.5carat (38,1grams) of small Lightning Ridge Opal Rough potch and color, mostly black or darker base. (not high color, but there are several pieces that have glow or bits of color to cut to. 

These would make good beginner or practice cutting pieces but many of the pieces are on the small side. Note that many do not have much (if any) color, but some pieces that do have nice color or glow. As this is very rough opal, there is sand or matrix and no guarantees they will cut stones, but the pictures are not enhanced and are a good representation of color when wet. 

The pictures are close up shots taken under LED light taken of the stones shown wet to bring out color potential when polished. The pieces range in size from as small as 7mm across up to as large as 20mm across. Thickness is as small as 2mm up to 8mm thick. (many pieces are in the 10-15mm wide range)  (These are small pieces, the ruler in some pictures is millimeters) 

These will ship from France regular poste so expect some delay if you are overseas. If you want to purchase multiple items, please let me know before payment so I can work out combined shipping.