The mother of Diamondstone U.S. is Don’t Think Twice (1.11,7 – $. 72.819). She is by Mackadamian who is also mother to (a.o.) Just Like A Dame (mother to He’s A Diffacolt (1.10,0 – Sek. 1.309.863), Donners AM (1.11,7 – Sek. 1.242.500) and Falcon AM (1.11,3 – Sek. 855.500)