What all the missventures caused was not just lack of time to "play" but also to experiment. I wanted "captive things", to capture elements that can be from a small jaw -Tiny!!!- to wow, whatever my imagination wanted, but I didn't want Just the polite way, resin and woshhh, done. That can work for other elements where I want the core to be Seen. In this case I wanted it to be "almost suspected", seen like thru a veil of ice... (I made some earrings with similar experimentation! And tiny jaws, lol). I imagined the mammoth trapped for ages in ice, almost visible... and played with tons of different substances, from liquid polymer to resin to wow, you name it, mixing, testing until the "one" happened. (Oh, no, you have No idea how many ended in the recycling bin. I wonder if somebody is assorting my trash what they think it happens at the studio, LOL. ) 
Inside the box almost ice like allows us to tenuously see the small jaws that preserves forever. Copper and Nickel form the structure where our tiny jewels might be like for almost ever. (OMG, just had another "imagination moment" and was thinking if archeologists find my trash in a couple of centuries or more. Which kind of barbaric creature lived in here, hahahaha. Ops, yeah, I can't stop the imagination, even a word can create an explosion of images that make me giggle in the worst moment!!!
Ok, now, the focal... oh, yes, it measures 4 1/4 inches, 108 x 55mm approx.