Fastidious and fussy; difficult to please; exacting, especially about details; meticulous and particular.
Subtle, scrupulous, carefully thought out.
Developed, improved.
Elegant, sometimes (derogatory) affected, prissy, or bloodless.
Highly-processed and pure.
Free of dross or alloy.
Dealing in a refined product such as sugar or petroleum.
Elevated and polished.
The refined form of a commodity, as opposed to its raw or generic form.