Sable (US)

Go to The Wash (SE region of the map) at night and look for bright pear-shaped plants on the ground. Pick one up and throw it with to break it open and release several Nimoor Butterflies.

This achievement is available to unlock as soon as you enter the south eastern area of the map (The Wash). This area has white sand and a lot of huge skeletons. The Nimoor plants can be found in an area called the Petrified Forest. A quest tied to bringing back three butterflies found inside the Nimoor plants can be picked up in Marrow Bone Station from Eliisabet and will give you a point on the map.

• When you get to the Petrified Forest make sure to do so by night. During the day the Nimoor plants are closed and looks like small rocks. By night they are open and glowing blue.

• When you approach a Nimoor plant you can pick it up and either throw it or put it down. Throw it to break it open. This will unlock the achievement Fragile Goods!

• If you want to complete the quest Tough Nut To Crack you must collect three butterflies and bring them back to Eliisabet.

Video for those that like those better.