. "4309"^^ . . . . . . . . . . . . . . . "In popular culture, sets of precious substances may form hierarchies which express conventional perceived relative value or merit. Precious metals appear prominently in such hierarchies, but as they grow, gems and semi-precious materials may be introduced as part of the system. The sequences can provide interesting examples of the arbitrariness of semiotic signs."@en . . . . . . . . "In popular culture, sets of precious substances may form hierarchies which express conventional perceived relative value or merit. Precious metals appear prominently in such hierarchies, but as they grow, gems and semi-precious materials may be introduced as part of the system. The sequences can provide interesting examples of the arbitrariness of semiotic signs."@en . . . . . . . . . . . . . . . . . . . . "Hierarchy of precious substances"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "635781"^^ . . . . . . . . . "1112151338"^^ . . . .