Author Archives: Mathieu Kessler

About Mathieu Kessler

France e-commerce manager at Juwelo. I quickly get a passion for precious and fine stones. It is always with great pleasure that I discover a new stone. My favourite gem? The Sphene! Its strong birefringence makes it one of the rare gems whose dispersion is stronger than that of the diamond. Not to mention it's pleochroism ...