Additional exploration (By Taylor, 1977) at the Rockslide area encountered Malachite-stained outcrops with a grab sample containing 760 ppm Pb, 0.67 % Zn and 36 grams per tonne Silver (Taylor, 1977). ...

Firestones share a drop table with several other mining resources, including Malachite Ore, and Dragonite Ore on low rank. If you're on a high rank hunt, you'll also have a chance of getting Light ...

Now, these nodes don't just drop Iron Ore. They also drop Malachite Ore, as well as Earth Crystals occasionally. However, Iron Ore is one of the common drops, so you should be able to get plenty ...