This card is one that I've cased from this month's (May 2010) Craft Stamper. It's a design by the very talented Lousette Ashton. I just loved this design so much that all I did was swap her pink colour scheme for my favourite purples.
The great thing about this card in real life is how the colours seen to change in the light. You may be able to see from the two pix here, that as you turn it either the Craft white Medallion stands out or the Dazzling Diamonds do.