sphalerite

[sfal-uh-rahyt, sfey-luh-]
noun
a very common mineral, zinc sulfide, ZnS, usually containing some iron and a little cadmium, occurring in yellow, brown, or black crystals or cleavable masses with resinous luster: the principal ore of zinc and cadmium; blackjack.

Origin:
1865–70; < Greek sphaler(ós) slippery, deceptive + -ite1

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Collins
World English Dictionary
sphalerite (ˈsfæləˌraɪt, ˈsfeɪlə-)
 
n
Also called: zinc blende a yellow to brownish-black mineral consisting of zinc sulphide in cubic crystalline form with varying amounts of iron, manganese, cadmium, gallium, and indium: the chief source of zinc. Formula: ZnS
 
[C19: from Greek sphaleros deceitful, from sphallein to cause to stumble]

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American Heritage
Science Dictionary
sphalerite   (sfāl'ə-rīt')  Pronunciation Key 
A usually yellow-brown or brownish-black cubic mineral occurring either as single dodecahedral crystals or as granular masses. It often contains cadmium, arsenic, or manganese and has a distinct rotten egg odor. It is often found in association with the mineral galena and is the primary ore of zinc. Chemical formula: ZnS.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Sphalerite veins and late barite veins occur locally.
Sphalerite typically occurs as red to brown fine disseminated grains in the limestone, fluorite, and calcite.
Sphalerite, galena and pyrite are found in crosscutting veins in a chert breccia with quartz veins.
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