I finally planted the Lithop and Conophytum seeds today. The Conophytum are pretty small, but the Lithops are downright tiny. The bigger things in the bag below are actually capsules with many seeds in them as opposed to these seeds themselves. I emptied them into a slightly curved Walmart receipt and then sprinkled them on the surface. I have no idea if they actually landed there or disappeared into another dimension.
Hopefully I'll start to see the first sprouts in a week. I had trouble finding the stuff I needed for the mixes I mentioned previously so I sort of winged it. I mixed 1/3 cactus mix with 1/3 fish gravel and 1/3 silica sand and a bit of vermiculite and put it in the bottom of the pot. I then put about 2cm of mostly gravel and sand with only a small amount of soil on top. Ventilation is important but I'll cover them with plastic so they don't dry out. They need a day and night heat cycle so I'll only keep them under the grow lights during the day.