JALT

What is it? A rock or mineral?

 * Rock # || Properties || Prediction: A rock or a mineral || Why ||
 * 1 || igneous, glossy, and dark || obsidian || Justin said so ||
 * 2 || shiny, luster, and dark || basalt || it is the same color as basalt ||
 * 3 || feels hollow, gray, and looks like plaster || the rock out of a driveway || it looks like it +texture ||
 * 4 || smooth, cleavage, splits flat, thin, and shiny luster || Mica || has the same description as mica ||
 * 5 || no luster, rough, and waxy || maybe halite || Halite has pretty much the same texture ||
 * 6 || it's white and earthy || possibly quartz or a rock || rock, because it sort of looks like the rocks in a backyard ||
 * 7 || it is rough, it has rocks in it, and shiny || rounded grain || it kind of has grain, in it ||
 * 8 || multi-color, and sedimentary || it is granite || because ||