This listing is for raw pieces of Ethiopian Opal (Welo Opal) these pieces range from 5mm to 15mm. You have the option to purchase this rough opal in 5g and 25g lots. Please expect about 6-9 pieces of stone per 5g. Many of the pieces of this raw opal contain beautiful red and green flash! These stones are perfect for jewelry making, alters, crystal grids, terrariums, and more! There is a picture of these stones next to a ruler to help give an idea of size. Please note that I am using my stock photos. The stones you receive will not be exactly the same ones in the pictures. They will be similar, but please allow for variance as each stone is natural and unique. If you have any questions please ask!