Natural Green Aventurine is available as a Powder, Sand, Coarse and Extra Coarse. The Powder is sifted through a 60 mesh screen. The Sand is sifted through 20 mesh screen. The Coarse is sifted through a 10 mesh screen. The Extra Coarse is sifted through a 5 mesh screen. All sizes are perfect for resin projects such as orgones/orgonites, i...