Actually, speaking of Phos and Cinnabar combining, the seven Buddhist treasures from the lotus sutra are gold, silver, lapis lazuli, seashell, agate, pearl, and carnelian. The first two Phos effectively gets from the alloy, the fourth and fifth from the mineralized seashell legs, and the third and sixth from Lapis's head with the spycam pearl eye. All that's missing is Carnelian, a red gemstone that Cinnabar (another red gemstone, precious to alchemists) could potentially stand in for.