These handmade transparent marbles with black and yellow swirls are some of the most popular and most sold items for regular buyers. Not many gems or other such things that are black colored look attractive or appealing, but this set of ten marbles look amazing. The unique design and the economical rates are what attract customers the most. They are extremely affordable so if you wanted to, you could purchase them in bulk quantity as per your needs. The quality of the glass used is also high and the best. The best part about buying in large numbers is that you then get to have free shipping no matter where you may live.