Hi this is a new product from 17 available from Boots in the UK and it costs £3.99.
It is a silver colour without glitter. I like this product as you can create different crackle styles by swiping the brush different ways. Over all like this product Same price as the Barry M crackles, but Barry M does not make silver. http://www.boots.com/en/17-Nail-Xtras-Crackle-Top-Coat_1205919/?cm_re=c9094_rot2-_-17_crackle_top_coat-_-product&cm_sp=brand_treatment-_-c9094-_-c9094_rot2