Glass marbles may be easy to find, but these heart-shaped yellow colored marbles with red swirls are unique and handmade using the best quality glass so you can use them without any worries for safety or durability. Heart-shaped gems or marbles can be used for craft projects like making cute jewelry. McGills warehouse not only provide the best in quality but also in their price range. The economical prices will let you buy as many as you want. The advantage of buying in bulk is that you get free shipping. Buyers from United States also do not have to pay any shipping fees.