blende 
(blĕnd)
(blĕnd)n.
1. Any of various shiny minerals composed chiefly of metallic sulfides.
2. See sphalerite.
[German, from blenden, to deceive (because it resembles lead ore), from Middle High German blenden, from Old High German blentan, to blind, deceive; see bhel-1 in the Appendix of Indo-European roots.]