To suspend any object in gel make sure you are using the high density versagel. That's the most important thing. There are basically two techniques that you can use: The layer technique and the drop and hope. The layer technique is simply pouring your gel in layers, letting it solidify, placing your embed in, then pouring another layer. This works the best in regards to having your embed exactly where you want it, but the layers leave lines on the glass. A heat gun "sometimes" takes those lines out by applying heat to the outside of the candle after it has completely cooled. The other method that I have used is the drop and hope method, pour your container full of gel, immediately put it in the fridge to cool, then drop your embed in a short time later and hope that it sinks to just the right spot. This method can be refined by testing it out. In either method you do not want your gel so hot that it has become thin. Pouring gel at certain temperatures produces different thickness of the gel as you pour it. The temperature at which you pour and the speed in which you pour also has a effect on how many bubbles you get in the gel. When dealing with wax embeds I generally like to pour a cooler, thicker gel so that I do not have to worry about pulling the dye out of the embed and into my clear gel.