HS, meaning horizontally set, refers to how prongs secure a crystal glass gemstone parallel to the setting. This allows light to freely enter for maximum radiance. By not obstructing the crown facets, HS settings showcase crystal’s dazzling optics. The discreet prongs spotlight the stone itself. Simple solitaires or elaborate halos suit HS crystal stones. Round, oval, emerald, and other cuts work beautifully. For important jewelry like engagements, HS settings frame crystal glass elegantly.