The Chemistry Store. M&P soaps are so fun and easy! Just like the name, you simply melt and pour. As for the larger gem molds, you have 2 options: 1. Make your own from appropriately sized gems and silicone molds, found here @ Make Your Own Molds. 2. You can purchase them premade from Renascent College or Flexible Molds. I'm sure there are a few others out there with premade gemstone molds. I searched for 'quartz point soap molds' or 'gemstone soap molds.'
For the shine, I use micha flakes, found at soap supply stores, as well as the skin safe color. I scent them with my own essential oils.
These make great gifts and party favors. My designs have really evolved since these photos were taken, so next time I make them I'll put up a full tutorial with some new pics.
For inspiration I visit Etsy's Gemstone Soap Search.