This quest is not available in game.
In your journeys throughout the Blasted Lands, should you ever come across a Flawless Draenethyst Sphere, take the item back to Kum'isha the Collector.
Be warned, this gem is one of the most rare crystals in all of Azeroth. Any creature in these lands could be holding a Flawless Draenethyst Sphere.
You will be rewarded for each Flawless Draenethyst Sphere you have collected.
<Race>, can your miniscule brain comprehend the rarity of a flawless sphere of draenethyst? Draenei have spent lifetimes in search of just one of these crystals, only to meet horrible fates, their purpose unfulfilled.
So you stand before Kum'isha, knowing what Kum'isha has requested and still wish to assist? Very well, <race>... At any time during your travels across these lands, should you find a flawless sphere of draenethyst, return it to me and I shall reward you with riches beyond your wildest dreams.