Rocks Slabs and Specimens › Dendritic Opal and common opal Image 1 of 2 Image 2 of 2 Dendritic Opal and common opal $25.00 From Brazil, lots of dendrites. Most pieces 1-2 inches, 6 lbs 13 oz Add To Cart Added! From Brazil, lots of dendrites. Most pieces 1-2 inches, 6 lbs 13 oz Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More