I did originally want the 'Mother of Pearl' Colour but also really liked the 'Black Pearls' shade, so my boyfriend got me both :) (lucky girl) but now after trying them both out (look out for the 'Black Pearls' review in the future) I think I do prefer the 'Black Pearls' shade over 'Mother of Pearls' although they are both really pretty. You can buy Ciate's Caviar Manicures directly from their online website [Link] or from Selfridges [Link] who strangely have more shades available! They are £18 each which is a bit expensive especially as MUA do a version for £2-3 (just the beads) however they will last you ages! Especially the actual beads because you use that little for each manicure and have a funnel which allows you to easily pour the excess beads back into the bottle.
*Instructions taken from the Ciate website
These nails depending on what your doing will not last long, a couple of days max. They are meant for a special event or if your a bit different and like to change your nails regularly.