boldyloxx
Hi! Good question.
It is my understanding that you only need one large quartz crystal even if the Orgone is going to be a large piece- but if I were making it, I would add either one large crystal with a point, or a few smaller ones. Same goes with the copper coil. It should be coiled in a clock-wise direction as in all the orgones you make of any size.
Be sure to use a metal or glass-- or cardboard mold. Plastic will melt from the chemicals in the resin or Bondo.
If I were you, i'd use an ugly old glass mixing bowl that you don't plan on using- and either crack it off after the Resin dries, or else get some of those aluminum mixing bowls--- the really large ones you could mix a giant Salad in, and spray it with WD-40 before pouring the liquid resin in it.
You can find these mixing bowls in the cooking section of KMart, Walmart , etc.- they often come as a set of different sizes.
I've seen large pyramid Orgones, so I would be interested in seeing what people use as a mold for those babies!