What is "false galena"

Sphalerite \Sphal"er*ite\, n. [Gr. ??? slippery, uncertain. See Blende.] (Min.) Zinc sulphide; -- called also blende, black-jack, false galena, etc. See Blende (a) .

Black-jack \Black"-jack`\, n.

1. (Min.) A name given by English miners to sphalerite, or zinc blende; -- called also false galena. See Blende.

2. Caramel or burnt sugar, used to color wines, spirits, ground coffee, etc.

3. A large leather vessel for beer, etc. [Obs.]

4. (Bot.) The Quercus nigra, or barren oak.

5. The ensign of a pirate.

Blende \Blende\, n. [G., fr. blenden to blind, dazzle, deceive, fr. blind blind. So called either in allusion to its dazzling luster; or (Dana) because, though often resembling galena, it yields no lead. Cf. Sphalerite.] (Min.)

1. A mineral, called also sphalerite, and by miners mock lead, false galena, and black-jack. It is a zinc sulphide, but often contains some iron. Its color is usually yellow, brown, or black, and its luster resinous.

2. A general term for some minerals, chiefly metallic sulphides which have a somewhat brilliant but nonmetallic luster.

n. blende