Another of the easier encrusted Saxifrages, this one does well with us and, we hope, will do well with you too. It forms tight, hard pads of pale, silvery-green and looks at it's best growing over or around a stone. It is not too slow-growing but takes a year or two to flower well - yellowish-white flowers on 15cm (6") stems in summer.
I think this is the correct name now - we grew it for years as Sax. Correvoniana - so it is one or the other.