pellucid

transmitting light; able to be seen through with clarity; "the cold crystalline water of melted snow"; "crystal clear skies"; "could see the sand on the bottom of the limpid pool"; "lucid air"; "a pellucid brook"; "transparent crystal"

लोकेश की मां एक निर्मल ह्रदय की महिला है

The swimming pool in the school is so pellucid that the tiles at the bottom are clearly visible.