15 to 50 grams per piece (Average 33.85 grams/pc). One of the pictures you can see a grid as background, the grid is 3cm x 3cm (1.18in x 1.18in) so you can have a reference of the size of the stones. The item "1000 grams Ametrine Gem Grade Rough, aprox size 15 to 50 gr.Piece, Deep Color" is in sale since Thursday, August 8, 2019. This item is in the category "Collectibles\Rocks, Fossils & Minerals\Crystals & Mineral Specimens\Crystals". The seller is "ramiroarivero" and is located in Santa Cruz. This item can be shipped worldwide.