THREE AXIS OF AESTHETIC CRITICISM: 1) CRAFT (Materials and Workmanship) 2) DESIGN (Aesthetic appeal and ‘beauty’) 3) CONTENT (Values, associations and narrative) The comparative quality of all art is objectively ascertainable by recursive triangulation.
1) Scarcity
2) Universal Utility.
3) Non-perishability
4) Volume and weight to value ratio (and therefore transportability)
5) Nearly universal convertibility.
6) Functional unit of account, store of value, and medium of exchange.
Very few goods meet this criteria. Silver and gold are pretty much the only goods that do meet this criteria.
https://www.quora.com/Why-is-gold-or-silver-precious-in-the-first-place-I-would-say-that-rice-is-precious