t cost three or more times 
as much as others. Again, price does not necessarily correlate with quality 
here, and quite viable palettes can be formed from the least expensive pigments. 
Also, some pigments are more permanent than others, and this too does not 
necessarily correlate with price. Some pigments are more transparent than 
others, and depending on your painting style you might have a preference for one 
or the other. Or you might have a preference for having both transparent and 
opaque c