Mink, Faux Mink, and Silk extensions are the most commonly used. The main difference between them comes down to their firmness.

Real Mink lashes come from the Mink tail, usually coming from either the Siberian Mink or the Chinese Mink. With Mink extensions, you'll get a light, fluffy, soft natural look. Real mink lashes usually last longer because they are so light.

Faux Mink lashes are man made, poly-fiber lashes. The Faux Mink lashes are a little more bold, slightly glossier than the Silk and Mink. 

Silk lashes tend to be thicker than any other type of extensions and also have that rick black color. Silk eyelash extensions tend to be the least comfortable type of extension and are best used for special occasions.