Pretty self explanatory. Get people to spend more gems/produce more gems.
T2/T3-able Domination Tower equipment. (Gloves, C-bow, Sword, Staff)
T3 Nex/Graetorian/Guardian sets.
T2/T3 Raid equipment.
T3 God-Wars equipment.
T2/T3 Barrows equipment.
T3 Whips
T3 Primals
T2/T3 Third-age equipment
T3 Dragon equipment
T2/T3 Exclusive shop items that aren't overrides.
Gives people more options and variety gear-wise and more incentive to collect certain items and spend/produce gems.