Open Ezhh opened 6 years ago
https://en.m.wikipedia.org/wiki/Cordierite
Catalytic converters are commonly made from ceramics containing a large proportion of synthetic cordierite. The manufacturing process deliberately aligns the cordierite crystals to make use of the very low thermal expansion along one axis. This prevents thermal shock cracking from taking place when the catalytic converter is used.
https://www.thoughtco.com/blue-purple-and-violet-minerals-1440938
http://www.blog.kpmgafrica.com/10-commonly-mined-minerals-uses/ http://skywalker.cochise.edu/wellerr/GLG101/GLG101-20-minerals.htm
Sulfur is definitely a contestant for yellow. Could be used for fuel.
Azurite could go in for another blue/cyan, and it's commonly used for pigments.
Graphite could be used for a dark grey.
Thanks benrob. Azurite is definitely a good idea. One more week of madness to endure, then hopefully I have time to start adding some of these.
Mostly to learn how to do it.
Ideas: (Give me some?)