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.
結晶 /ke-sshou/ : crystal.
If you want the word 'crystal' itself transliterated it would be spelled クリスタル /ku ri su ta ru/, it can also be used meaning 'crystal'.
I think it would be kuro(black) and ekisho(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
kokuchou
kuroji
kuroari
kuroikokoro
Kurotsuki
Kokushibyou
Kuro Aisu=Black Ice
Kuroi sora is black sky.