Skimming through the sample treasure parcels in the economy preview, I noticed each parcel is interchangable between gold, gems and art objects. For example, paragon tier treasure 8: 8,500 gp, or one 5,000 gp gem + one 2,500 gp art object + 1,000 gp, or eight 1,000 gp gems + 500 gp.
HOWEVER -...