I hand cut focal bead made out of genuine jet and inlaid it with a real confetti sunstone from Tanzania. The deep black jet makes the schiller in the sunstone pop! The measurements are shown in the listing title in mm's and the bead has a 2.5mm side drill hole. It has a high polished finish all around. If you do a youtube search for "Genuine Gemstone Jet Inlaid w/ Sunstones" you will find a video that shows the movement of the fire in some pieces like this that I have made. I work in a variety of natural jet from around the world but most of it is from Russia or Tennessee. Jet is a kind of gem grade lignite coal that has been used in beads and jewelry for over 15,000 years. It reached its biggest popularity during Victorian times as traditional mourning jewelry. For this reason it is still associated metaphysically with alleviating grief and depression. It is also said to help with financial stability. CHAIN NOT INCLUDED.