No,that is pitch, or dried sap. This is what creates amber. The fatwood is wood that has healed and absorbed the pitch. Imagine nature soaking a cottonball in petrolatum. Collecting pitch is a good idea for tinder too. I'm not a big fan of magnesium. I would rate it as good as the others. It comes down to having it on hand when you need it <img src="images/graemlins/wink.gif" alt="" />