I'm not sure what it is about Tarte, but clearly they've got the mini game down (you can read my review of their cheek tint here).
This is the mini smart mascara called "gifted." Essie said recently that she doesn't know what makes it smart. I tell ya, I don't know either, but something intelligent is happening in this tiny bamboo package. I was planning to purchase the full-size version of this new mascara and then saw a mini in the (deadly) travel size maze that is the Sephoracheckout. I chucked the $20 one and opted for it's little sister to make sure I liked it.
Uh, the full-size one will definitely be coming home with me soon. Tarte has figured out how to lengthen, separate and volumize in one tube. Plus you can add multiple coats without clumping. Smart, indeed. Grab some and feel your IQ rise. Your lashes certainly will.