Ber"yl (b&ebreve;r"&ibreve;l), n. [F. béryl, OF. beril, L. beryllus, Gr. bh`ryllos, prob. fr. Skr. vai&dsdot;ūrya. Cf. Brilliant.] (Min.) A mineral of great hardness, and, when transparent, of much beauty. It occurs in hexagonal prisms, commonly of a green or bluish green color, but also yellow, pink, and white. It is a silicate of aluminium and glucinum (beryllium). The aquamarine is a transparent, sea-green variety used as a gem. The emerald is another variety highly prized in jewelry, and distinguished by its deep color, which is probably due to the presence of a little oxide of chromium.

• A mineral of pegmatite deposits, often used as a gemstone.
  
• (colour) a dull blue colour.
       beryl colour:   
  
• (colour) of a dull blue colour.
  

• A female given name.