Dark Koroit Boulder with bright Veins

Description

A very captivating stone of dark Ironstone with random veins of tan/yellow Opal. Some veins display fire,and some dont. I always felt that if I cut this stone down,just a little bit more........well,I never did it,so I guess I'll never know. 50mmx26mmx5mm. Fifteen grams,or seventy five carats.