Apophyllite and Stilbite - OTH 013

Measurements:  195 x 83 x 55 mm                                            

Description:  A lovely display specimen consiting of clear apophyllite crystals and yellowish stilbite crystals sitting on a trimmed basalt matrix. 

There are a few nicks and contact marks to the sides of the specimen.

Weight of Specimen:  1 080 g (1.08 kg)

Chemical Composition:  KCa₄Si₈O₂₀(OH,F)•8H₂O  (apophyllite) 
                                       (Na,Ca,K)_6-7[Al₈Si₂₈O₇₂] • nH₂O  (stilbite) 

Hardness on Mohs Scale:   (apophyllite)  4.5-5
                                             (stilbite)  3.5 – 4  

Specimen Code:  OTH 013

R 800