WULFENITE  , a See also:

• MINERAL

mineral consisting of See also:

• LEAD
• LEAD (pronounced iced)

lead molybdate, PbMoO4, crystallizing in the See also:

• HEMIMORPHIC

hemimorphic-See also:

• TETARTOHEDRAL

tetartohedral class of the tetragonal See also:

• SYSTEM

system . Crystals usually have the See also:

• FORM (Lat. forma)

form of thin square plates bevelled at the edges by pyramidal planes . They have a brilliant resinous to adamantine lustre, and vary in See also:

• COLOUR (Lat. color, connected with celare, to hide, the root meaning, therefore, being that of a covering)

colour from greyish to See also:

• BRIGHT, JOHN (1811-188g)
• BRIGHT, SIR CHARLES TILSTON

bright yellow or red: the hardness is 3, and the specific gravity 6.7 . Small amounts of See also:

• CALCIUM [symbol Ca, atomic weight 40.0 (o= x6)]

calcium are sometimes See also:

• PRESENT

present isomorphously replacing lead . The mineral occurs in See also:

• VEINS

veins of lead ore, and was first found in the 18th See also:

• CENTURY (from Lat. centuria, a division of a hundred men)

century in the lead mines at Bleiberg in See also:

• CARINTHIA (Ger. Kdrnten)

Carinthia . Bright yellow crystals are found in New See also:

• MEXICO
• MEXICO (Span. Mejico, or Mexico,)
• MEXICO, FEDERAL DISTRICT OF
• MEXICO, GULF OF

Mexico and See also:

• UTAH

Utah, and brilliant red crystals in See also:

• ARIZONA (from the Spanish-Indian Arizonac, of unknown meaning,—possibly " few springs,"-the name of an 18th-century mining camp in the Santa Cruz valley, just S. of the present border of Arizona)

Arizona .