بلوربِلَّوْرٌ (M, Msb, K) and بَلُّورٌ (Msb, K) and بِلَوْرٌ, (K,) or the last only, (IAar, T,) [a coll. gen. n., signifying Crystal;] the kind of stone called مَهًا, (M,) which shines by reason of its whiteness and clearness; (TA in art. مهو;) a well-known kind of stone, the best of which is brought from the islands of the Zinj (الزِّنْج); (Msb;) a well-known kind of precious stone, (K, TA,) white and transparent: (TA:) [Golius says, but I know not on what authority, if on any better ground than the resemblance of the name, “Græc.βήρυλλος, beryllus, lapidis genus: de quo vide Plin. xxxvii. 5: aut potius, quo illum lapidem adulterari idem scribit, crystallum: ”] n. un. with ة: (M:) some say that it is a kind of glass [or factitious crystal; what we term crystal-glass; and to this the word is commonly applied in the present day; though still also applied to rock-crystal]. (TA.)