2010: two-year-old season White Moonstone began her racing career in a six
furlong maiden race at
Ascot Racecourse on 23 July and started at odds of
15/2 against ten other fillies. After racing wide on the final (right-handed) turn she tracked left to race up the stands-side rail, took the lead inside the final furlong and drew away to win by one and a quarter
lengths from the favourite Florestans Match. Two weeks later she was moved up in class and distance for the
Group Three Sweet Solera Stakes over seven furlongs at
Newmarket Racecourse and started 11/4 joint-favourite alongside the
Empress Stakes winner Khor Sheed. She started slowly and raced at the rear of the nine runner field before taking the lead a furlong out and won "comfortably" by a length and a quarter from Crying Lightening despite hanging left in the closing stages. Dettori commented "She drifted to the left but that is just immaturity. I thought I was in trouble three out but she soon came back on the bridle and quickened really well when I asked". On September 10 White Moonstone was stepped up in class and distance again and started 8/11 favourite for the Group Two May Hill Stakes at
Doncaster Racecourse. The best fancied of her six opponents were the
John Gosden-trained maiden winner Midnight Caller and the
Star Stakes winner Lily Again. After being restrained by Dettori in the early stages she began to make progress in last quarter mile. She moved into the lead and quickly went clear to win "easily" by five lengths from the 66/1 outsider Al Madina. After the race the filly was made 7/1 favourite for the following year's
1000 Guineas. Saeed bin Suroor said "I like her. She's got plenty of speed and she worked very well in her last piece of work. She's sound and happy and I'd like to go for a Group 1 with her. We've always liked her she's got class and is a big strong filly" whilst Dettori described the winner as being "like a super model - she's tall, skinny and beautiful". On her final appearance White Moonstone was one of five fillies to contest the Group One Fillies' Mile at
Ascot Racecourse on 25 September. She started the 4/5 favourite ahead of the
Prestige Stakes winner Theysken's Theory and the
Silver Flash Stakes winner Together whilst the two outsiders were Fork Handles (unplaced behind White Moonstone at Newmarket) and the maiden Traffic Sister. The favourite raced in last place as Fork Handles set the pace before giving way to Theysken's Theory in the straight. White Moonstoned took the lead inside the final furlong and held off the late challenge of Together to win by a neck. Commenting on the filly's performance, Dettori said "I don't think she ran as good as she did at Doncaster. Her turn of foot wasn't as good and the race came a bit quick, but to win like that is still very pleasing" but added "she is quite light-framed and I don't think she'll take much more racing".
2011: three-year-old season White Moonstone returned to England in the spring of 2011 to begin serious training for the
1000 Guineas. Eight days before the race she was found to be "stiff" after a training gallop and was withdrawn from the race. Godolphin's racing manager commented "Unfortunately, White Moonstone is not right and we need to find the cause of the problem". The filly never raced again and was retired from racing at the end of the year. ==Breeding record==