Muslim female is responsible not to expose her beauty in front of non Mahram men. Curling eyelashes is allowed but it is should Muslim female should not expose her beauty in front of non Mahram men. Wearing rings is also allowed provided it should not be exposed to non Mahram men. Growing long nails is no exception but nails should not cover the tips of fingered preventing water from reaching to the tips of the figures. If nails prevent water from reaching to any part of the figure, Wudhu and Ghusl will be then invalid.
Wassalam.