Silver is KoGaMa's least valuable currency, and although it can be used to purchase Avatar Accessories, Materials, Logic Cubes, Advanced Logic Cubes, and Pickups, it is mainly used to buy and sell various objects in the Marketplace.  Currently, players are automatically given 1,250 Silver cubes when they create an account on any one of KoGaMa's servers.  Players may also choose to convert Gold to Silver in order to increase their currency.

The Silver Counter, as seen on the upper toolbar of the website

Silver Cubes Price
10 1 Gold cube
100 10 Gold cubes
500 50 Gold cubes
1,000 100 Gold cubes
2,500 250 Gold cubes
5,000 500 Gold cubes