consisting of or containing or of the nature of crystals; granite is crystalline'

distinctly or sharply outlined; crystalline sharpness of outline- John Buchan

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

[ Syn: crystal clear , limpid , lucid , pellucid , transparent ]