After you Complete his brief Prismatic Perfection quest, Konley begins doling out this three-part questline. Note that if you have not yet attained Level 45, you will need to get there first, before you can purchase the land beneath the Crystal Citadel.
Also note that, if you can time the first part of this quest to coincide with the first part of Magnus' Silk, Spice and Diamonds questline, then you can knock out two requirements with one stone, by sending both Magnus and Konley to the Crystal Citadel at the same time.
Once you complete this questline, Konley will be giving you the Looking for Lore quest.
Part 1 of 3
Expand to the Crystal Citadel
Send Konley to the Crystal Citadel
Find 1 Diamond
Part 2 of 3
Gather 1 batch of Silkworm Cocoons
Gather 3 Turquoise
Make 5 Turquoise Silk Pouches
Part 3 of 3