ᎣᏂ ᏧᏩᎫᏛ 1968 ᎯᎠ ᏧᎬᏩᎶᏗ ᎠᏕᎸ ᏓᎶᏂᎨ ᎾᎿ ᎯᎠ ᎠᏍᏚᎢᏛ ᎤᏂᎾᏗᏅᏗ ᎤᎭ ranged ᏂᎬᎢ, ᎬᏙᏗ ᎪᏪᎸ ᎦᎸᎳᏗ $850/oz ($27,300/kg) ᎾᎿ 21 ᎤᏃᎸᏔᏂ 1980, ᎡᎳᏗ $252.90/oz ($8,131/kg) ᎾᎿ 21 ᏕᎭᎷᏱ]] 1999 (ᎫᎴ ᏗᏍᎪᏂᎯᏱ ᎣᏍᏛ ᎢᎬᏁᏗ). ᎾᎿ 11 ᎠᎾᏍᎬᏘ 2006 ᎯᎠ London ᎠᏕᎸ ᏓᎶᏂᎨ ᎣᏍᏛ ᎢᎬᏁᏗ ᏥᏄᏍᏛᎩ $715.50/oz.