green tea soap

I'm making an unscented green tea soap with activated charcoal (yay!). I infused green tea in boiling water and put it in the freezer overnight. I was wondering if I can sprinkle some dry green tea on the top of my soap as decoration? What I'm really worried about is it becoming moldy, either...

The yellow/orange one is mango and yogurt, scented with fresh mango from bb. Next one is avocado-green tea. I kinda like soaping with fruit purees, i might do it again. A bit nervous about the green tea, since my previous experience ended up with a yucky brown colored soap. I didn't use much...