Quartz Crystal Groups – BULKsa 017

Description:  Ten small quartz crystal groups ranging in length between 23 and 30 mm. Some have rutile inclusions and bits of dolomite and feldspar. A few have bits of iron oxide coating on the surface.

Below are examples of those included in the lot. They have relatively little damage, mostly contact and pressure marks.

Total Weight of Specimens:  50 g  

Chemical Composition:  SiO₂ (quartz)
                                        KAlSi₃O₈ (feldspar)
                                        CaMg(CO₃)₂ (dolomite)           
                                       TiO₂  (rutile)           

Hardness on Mohs Scale:  (quartz)  7 
                                          (dolomite) 3.5-4
                                          (feldspar) 6 - 6.5
                                         (rutile) 6.6

Location:  Vredendal Lime Quarry, Western Cape, South Africa.

Specimen Code:  BULKsa 017