You must return to [npc=94686] at Aktar's Post in order to turn in this quest.
Once completed, you can use the Apexis Gemcutter next to Sun-Sage Chakkis to start cutting epic gems. At first, only Immaculate Versatility Taladite is available. The gemcutter requires other "modules" in order to be able to cut the other epic gems. How to acquire those modules:
Immaculate Critical Strike Taladite - [item=127771] dropped by [npc=95067] in Hellfire Citadel, the new raid in 6.2
Immaculate Haste Taladite - [item=127772] dropped by [npc=76266] in Mythic Skyreach - a new difficulty in 6.2
Immaculate Mastery Taladite - [item=127773] sold by [npc=68363] or [npc=68364] at the Brawler's Guild - requires Bizmo's Brawlpub Rank 6 - costs 800g
Immaculate Haste Taladene - [item=127774] sold by any of the Arrakoa Apexis Traders in Stormshield (next to the bonus roll quest giver outside the AH) - costs 3,000g and 3,000 Apexis Crystals
Immaculate Stamina Taladite - [item=127775] dropped by Rukhmar, a world boss found in Spires of Arak