UP for Auction is a Handmade Glass Art Marble made By me Bryan Potter in my shop/studio, a small town near Rocky Mountains in utah. this marble is 1.100". all of my marbles are made from high quality borosilicate (pyrex) , and high quality colors from north star and momka, all my glass creations have been digitally kiln annealed for strength and durability. all of my marbles come signed and dated (BP 14) with ti pen. Free shipping on all my marbles. thanks for looking any questions or requests please feel free to ask. international shipping may be additional cost.