クリスタル ( ku ri su ta ru) is the gairaigo (borrowed word) in Japanese.
水晶 (su i shou) is Japanese word for crystal.
Sorry for the funny word but I say it is "Kristily". The right way to say Crystal in Japanese would be kesshou (結晶).
i dont k now
You may say 'kesshou,' written: 結晶
its kuro
kuroikokoro
Kurotsuki
Kokushibyou
kuroari
kokuchou
kuroji
Kuroi sora is black sky.
Kuro Aisu=Black Ice