Looks almost like pot shards, doesn't it? 

At the Violin Makers' Workshop in Oberlin, OH this year, we went through a process of making lake pigments that was relatively simple (if a little messy at times).  I particularly liked the accuracy of the recipe we were given -- rather than the customary vague "oh, a handful of this, a pinch of that".
  It was with great enthusiasm I embarked on making my own pigment when I got home.  I bought fancy lab equipment, and plant substances to draw colour extracts from.  I set up shop on my patio.  I weighed and measured, steamed and stirred.

So I wasn't prepared for the strange phenomenon that followed:  having followed the recipe exactly, instead of the lovely golden/orange/brown pigment we came home with from  Oberlin, I ended up with somewhere between rose (looked at with kindly eyes) and brick (on a less happy day).  Onwards and upwards, I suppose!  By the time I've explored the full range of possibilities, I'll have the full palette, if nothing else.