Engrave has a really nice collection of ceramics!
You can check out goodearth.in for amazing designs and colours.
Checkout Ellemnetary, Jaypore and The Decor Kart.
You can check IndiaCircus.com
If you are looking for ceramic mugs, then I will recommend Mugs from Kudos. They are trendy and very colourful. Do try them, they are easily available at any crockery store in Delhi.
You can even check out Big Basket for this!