Collect rock samples from near the Warpfont Spire and the Harrowglade. These are part of the landscape, and become harvestable when you have the quest. Get three of each kind of rock and return to Geldax.
Warpfont Spire (rocks are spread out from this point): -139.50, -38.70, 227.80
The Harrowglade (you'll see rocks around here): 43.10, -37.40, 217.75
The proper name of this page, Other Materials?, contains a question mark which gives the wiki trouble. Therefore the Wikibase title has had the question mark removed.
