NNNNNYYYEH, my gem stockpile is in a bad place to play with magma. Will making a pearlash stockpile and linking both it and the raw gem stockpile to the magma glass furnace work?
Also, what skill governs the assembly of any given instrument? My goal is to have one of each of my civilization's instruments in my tavern; every one-piece instrument shall be masterwork, every multi-piece instrument will be masterfully assembled from only masterwork parts and everything is going to be made from the most expensive materials available. However, there's a problem: out of my civilization's 14 instruments, only 2 are one-piece (a glass flute and a large stone bell). For the other 12, I have to make a total of 5 types of ceramic pieces, 2 types of glass pieces, 10 types of metal pieces, 3 types of leather pieces, 5 types of stone pieces, 5 types of wood pieces, 3 kinds of bone pieces, 3 kinds of silk pieces and 1 kind of cloth pieces. So you see, I'm deliberating over whether to use crystal class, porcelain (from imported kaolinite, since there is none on my map), aluminum and platinum for my glass, ceramic and metal pieces and risk running out before I produce any perfect instruments from them or whether to use clear glass, stoneware (from local fire clay) and gold which are less valuable but either unlimited or nearly unlimited. Knowing which skill was used to assemble instruments would help me make that decision.