ST refers to step cuts which arrange crystal glass facets in orderly rows resembling stair steps. Popular step cuts include Emerald, Asscher, and Baguette shapes. The broad, open planes act as reflective windows to multiply light. Step cuts require immaculate clarity to avoid inclusions being visible. The Asscher cut hides flaws more readily with its cropped corners. For crystal glass’s flawless transparency, step cuts make a perfect match. The resulting brilliance and geometric shapes create sophisticated beauty.