I love the sugar tiles and gems. How do I make these. Do I need a recipe, mold? I would love to use these on an up coming cake. Your help would be much appreicated.

http://cakecentral.com/gallery/1418422

If you look at the comments on the picture you liked to, the OP listed some details on how she did it.

She used isomalt and poured into the brownie squares pan.