Blue and white colored marbles or gems may be common but this set has ten handmade 16mm inch glass marbles with a unique pattern and design that you cannot find anywhere online. McGills warehouse has a wide variety of such items on their site that you can peruse from. The quality of all their items is guaranteed to be amazing and you will be satisfied after your purchase. The economical prices also make it easier to buy the products in bulk and as much as you want. You also will not be required to pay any shipping or delivery fees if you do buy a large number of products.