It is now acquired from Major Mary Rancour by asking for "free stuff". It may also be reclaimed from her for free by saying you have lost your Dwarven army axe. When cutting a normal tree, you have a chance of receiving a wooden knot. This can be crafted into an unfinished brooch. When mining copper or tin ore, you can receive an uncut lapis lazuli gem. This can be cut into a lapis lazuli gem. The two can be combined into a Lapis lazuli brooch.