Fls 2–3 per stem, star-shaped, 75mm wide, facing downwards; perianth segments 32mm long, ovate, blunt, white, slightly reflexed, concave or with margins wavy, smooth and of membranaceous substance, overlapping one-third; corona 14mm long, cup-shaped, broadly ribbed, opening pale cream, becoming white, mouth a little expanded, wavy, with rim entire. 

The flowers are a creamy yellow which fades to a pure white, very beautiful.

Simon Mehnert visited Brian Duncan and named this cultivar  for “our 15 year (Crystal) Wedding Anniversay. In terms of the name Shell’s – Is Short for Michelle (my Wife), Crystal is the anniversary and star as its what the flowers resemble… Shell’s Crystal Star.”