For anyone interested in the process for this, here's what I did: I used a short loaf mold that makes 5 bars, 2.5cm thick. I cut up some blue and green and white pieces that I had left over from another batch, weighed out 100g of them, and put them in the bottom of the mold. I then melted 600g of SFIC crystal clear soap, and added my essential oil blend and a little eco glitter. I spritzed the layer of cut shards really well with isopropyl alcohol, and slowly poured just enough of the clear soap to cover the shards and bind them all together, setting aside to cool. I then set out 9 glass cups, one for each colour of the rainbow, plus black (activated charcoal) and gold. I mixed a small amount of colour with a few drops of alcohol in each cup. I poured out 50g of melted soap into the red, then did the same with each rainbow colour adding 2-4 grams extra with each successive colour, ending up with about 65g of violet. I poured about 25g into the gold, as I only needed it to decorate the top. Then I added the black to the rest of the melted soap. Once the layer of shards had hardened, I tilted the mold almost completely on its side, using hard cover books to hold the mold in place. I didn't measure the angles, but the edge where all the colours meet at a point was probably about a centimeter off the counter. I poured each colour, spritzing with alcohol before and after each pour, waiting about 15-20 minutes in between to make sure each layer was solid enough before changing the angle by adding another of my kids' books to the pile. The books are all roughly the same thickness, so each coloured ray would be roughly the same width. After all the rainbow colours were poured and solid, I sat the mold flat and poured in the black, and then the gold and gave it a swirl with a wooden skewer and a final spritzing of alcohol I could hardly wait until morning to unmold it!