248 IMPERFECTLY EXAMINED MINERALS. 



VELVET BLUE COPPER. L. pearly. C. bright smalt-blue. In short 



capillary crystals. 

 VIGWITE. 



(Blue Magnetic Iron-ore.) Sp. Gr. 3-71. C. dark greenish-blue. 



W. 



WHITE IRON-SINTER. 



WILLEMITE, Levy. C. white, yellowish, or reddish. Trans. In small 

 rhomboidal crystals. 



Y. 



YTTRO-CERITE, JBerzel. H. between 4-0 and 5-0 ? Sp. Gr. 3-44. C. 



violet-blue. Massive. Opake. 

 YTTRO-TANTALITE. H. 5-5 ? Sp. Gr. 5-3. ..5-8. L. imperfect met. 



C. blackish-brown, or black. Opake. Massive. 



Z. 



ZURLITE, Ramondini. H. 6-0. Sp. Gr. 3-27. L. res. C. green to 

 grey. In rectangular four sided tables. 



