The black pair on the left is Louboutin's Clou Noeud which retail for $1,195 - epp! If I could spend that kind of money, I would probably get them in nude.
The silver and clear spiked pair on the right is St. Jeannette 120 which are available on bluefly.com for slightly less at $780.
Heels like these might seem a bit intimidating, but they really could go with just about anything. In fact, they could be a really nice way to add a little edge to a dressed down look with jeans or a strong feminine touch to a pair of dress pants.
If you're into these heels, you should act fast. They've already sold out at nordstorm.com and there's only a size left at solestruck.com and karmaloop.com. But hurray for Zappos! They have both black and white in all sizes with free shipping & returns. Happy shopping!