Fluorite and Calcite Crystals on Matrix – SNCO 071

Measurements:  36 x 27 x 20 mm

Description:  Purple fluorite crystals (the largest 15 mm on edge) together with light straw-coloured calcite crystals, sit on a matrix of (mostly broken) quartz crystals and bits of (?)feldspar and epidote.

A few of the quartz crystals are undamaged. The fluorite has no obvious damage, while the calcite also appears to be undamaged.

Weight of Specimen:  21.3 g

Chemical Composition:   CaF₂  (fluorite)  
                                        SiO₂  (quartz)  
                                         CaCO3  (calcite) 
                                         KAlSi₃O₈  (feldspar)                      

Hardness on Mohs Scale:  (fluorite)  4
                                          (quartz)  7
                                           (calcite)  3 
                                           (feldspar) 6 - 6.5 

Location:  Orange River area, Northern Cape, South Africa.

Specimen Code:  SNCO 071

US $ 25