There are several ways to tell whether or not you are purchasing genuine Swarovski crystals. First, look at the shape of the crystals. The height, width and slope of a genuine Swarovski crystal are consistent. Since Swarovski crystals are machine cut, each crystal is similar. An imitation will have different dimensions and will not have a uniform cut.
Look at the quality of the surface of the crystal. A genuine Swarovski will sparkle and have no scratches, fogginess or swirl marks. An imitation crystal will appear foggy and have scratches and swirl marks.
Look inside the crystal for bubbles. Genuine Swarovski crystals are clear. Imitation crystals will have bubbles.
The quality of crystal is based on its lead content. The more lead it contains, the better quality of crystal. In the U.S., glass with 1 percent lead content is considered crystal jewelry. However, Swarovski crystals have higher standards when it comes to lead content. They may contain 30 percent lead or higher. It’s for this reason that Swarovski crystal is considered by many as the best-quality crystal worldwide.
Due to its lead content, Swarovski jewelry is not recommended for children under 12 years of age.