Changes

{{Mineral | name=Galena | cdesc=Lead sulfide | formula=PbS | cluster=Dark lead-gray; metallic; streak: dark lead-gray | hardness=2 1/2 | cleavage=Perfect in three directions at 90º | odata=''fracture'' subconchoidal (rare); brittle| sgravity=7.4 to 7.6 | crystal=Isometric; commonly in [[cubes]] and [[octahedrons]]; [[dodecahedrons]] less frequent; also [[massive]] and in cleavage fragments, [[coarse]]- or [[fine-grained]], [[fibrous]] | fmark=Cubic cleavage and lead-gray color | species=The cubic cleavage and dark lead-gray color will distinguish galena from [[sphalerite]], [[jamesonite]], and [[stibnite]]| enviro=Galena is the commonest of all lead minerals and occurs in several environments. | occur=Fine crystals and crystal groups| norigin=From the [[Latin]] ''galena'', which was applied to [[lead]] [[ore]] or the [[dross]] from melted lead.  }}

{{Mineral  

| name=Galena  

| cdesc=Lead sulfide  

| formula=PbS  

| colors=Dark lead-gray; metallic when fresh

| streak= Dark lead-gray  

| hardness=2.5

| cleavage=Perfect in three directions at 90º  

| fracture= Subconchoidal, (rare); brittle

| sgravity=7.4 to 7.6  

| csystem=Isometric

| chabit=Commonly in [[cube]]s and [[octahedron]]s; [[dodecahedron]]s less frequent; also [[massive]] and in cleavage fragments, [[coarse]]- or [[fine-grained]], [[fibrous]]  

| cleavage=Cubic cleavage  

| enviro=Galena is the commonest of all lead minerals and occurs in several environments.  

| occur=Fine crystals and crystal groups

| nameorigin=From the [[Latin]] ''galena'', which was applied to [[lead]] [[ore]] or the [[dross]] from melted lead.   

}}

Chesterman, pp. 361-362

Chesterman, pp. 361-362

=Sources=

==Sources==

*Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987)

*Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987)

<includeonly>[[Category:Minerals]]</includeonly>

<includeonly>[[Category:Minerals]]</includeonly>