What is Ironwood? Ironwood is used to describe a large number of very dense (read heavy) wood. Not to get too nerdy, but generally speaking to qualify as ironwood the specific gravity needs to exceed 1. For those of you who havent taken an elementary school science class recently that means ironwood sinks in water (the specific gravity of water is 1). Our ironwood comes from Memecylon Umbellatum, which originated in the forests of India, has a beautiful blue flower, and is now grown all over the world. Its specific gravity varies, but generally speaking averages 1.04. In short, for all of you who were purchasing our buckle as a supplemental flotation device dont. Just in case the three layers of nickel silver didnt make you reconsider, our ironwood is only going to compound the problem. You might have read this in one of our other three layer buckle descriptions, but our three layer buckles have been one of our most popular designs for over two decades. The timeless design highlights the difficulty, and artistry of the inlay. We fully expect this buckle will be one of our most popular buckles for decades to come (with that said, dont worry we are still a small company, so you are unlikely to ever see someone else wearing one).Made of nickle silver and ironwood, this buckle is handcrafted to last a lifetime. There are three circles of Ironwood, each slightly raised from the one below it. This buckle is 3.75'' by 2.75''.