You quickly hug Grue, assuring him he has more then enough. With a big sniffle, he wipes his eyes. "Really?" You nod, and everyone else nods too. Grue brightens up immediately. "YAY! Grue want that one!" He points to a geode, rough and rocky on the outside, pretty purple crystals on the inside, about the size of a human head with both halves. It's the one silver rock you saw. Since Grue can't fit in the door, you head inside. The place looks empty, like it no ones been in for years. Although it feels a little awkward, you take the geode, and leave one silver, along with the price tag, on the counter.
As you step outside, a thought occurs to you. You make a note to get Grue's money from Tanot at the first opportunity, then you ask Grue is he can read or count. Grue nods energetically. "Grue can count! Grue can count to lots!" he starts counting his fingers. "One, two, three, four, five, six, seven, eight, nine, ten, lots! See? Grue can count to lots." His brow furrows again. "But Grue can't read. Is Grue in trouble?"