I think it's safe to say it has been a great year for butterLondon. They have exploded onto the nail polish scene, and are now reviewed and revered every where you look. I hesitate at the price, $18 is not typically what I want to spend on a nail polish, but their colours are beautiful. When I saw Black Knight on Glymm's website it had just come out in their Christmas holiday collection. It was gorgeous... it was sparkly...it had to be mine! I used my points to knock $10 off the price but with shipping it still hit the $15 mark. When I got it I was excited, and immediately put it on. The formulation, packaging, brush: all stunning. And other then taking it off (which is a major pain), I absolutely love it. But...why spend $18 when you don't need to!
I stumbled upon this dupe by chance. I have owned the Black Sally Hansen nail polish for almost a year, it is a fantastic black nail polish. I just happened to buy Rockstar Pink a few weeks ago. I was trying to think what polish colour it would look good over when I saw it beside the Black Knight. The glitter is very similar so I decided to see how close the combo could be. I used two coats of black polish and one coat of the sparkle. The resemblance was amazing. The Sally Hansen colour actually gave me something I was craving from the Black Knight: a deep black base colour. I find that Black Knight is a very greyish black, that never gets as dark and deep as I would like. If you fell in love with Black Knight like I did, try out the Sally Hansen combo (which only costs me $5 in total!).
I hope this was helpful!