The Charred Granite of the Dark Portal (Alliance)

Objectives
Obtain 24 Charred Granite Chips. Provided item:
 * Charred Granite Chips (24)
 * Portal-Sentry's Mining Pick

Description
Kasim wants you to gather granite chips from these chunks of rock around the Dark Portal. I don't know what he'd want rocks for, but I have my suspicions, and they're not pleasant ones.

Use this pick and look for small outcroppings of rock along the edge of the portal's blast radius.

Rewards
You will receive:

Progress
Please, lower your voice.

Completion
I hope this is what the gnome wanted.