Browsing Archive: June, 2011

Mineral of the Month - Analcime

Posted by Site Moderator Webmaster on Friday, June 24, 2011, In : Mineral of the Month 

                 
Goboboseb crystals showing crystal clear analcime – photos and specimens PdB
 
NaAlSi2O6-H2O, Hydrated Sodium Aluminium Silicate

The name of the mineral comes from the Greek word analkis that means weak.

Analcime is a zeolite and occurs frequently in basalts and other basic igneous rocks associated with other Zeolites.

Crystal system: triclinic (Pseudo-cubic)

The aluminosilicate framework of the crystal structure does not change in topology at all.  The reduction...

Continue reading ...
 

Mineral of the Month - Cuprite

Posted by Site Moderator Webmaster on Friday, June 24, 2011, In : Mineral of the Month 

Crystal system:                 Isometric                                             Hardness:                        3,5 - 4,0
Density:                               6,15 average                                      Streak:                             Red       
Colour:                                Red to a deep red that can appear almost black.
Cleavage:                            Is fair in four directions forming octahedrons.
Occurrence:                       Oxidized zone of co...

Continue reading ...
 
 
Make a Free Website with Yola.