
Swarovski crystals are available to professionals only. Are you a private customer? You can find the same crystals under the PureCrystal brand: same quality, same shapes, same colours.
The 4120 has a relatively flat back, designed to be set or glued to a support. The 4122, on the other hand, has a point on the reverse, giving it a more pronounced volume effect. The choice depends above all on the type of frame used.