Dioptase and Malachite Crystals on Matrix - NKO 013

Gemmy dioptase crystals and malachite crystals on matrix

Measurements:  38 x 29 x 25 mm

Description:  Gemmy, well-formed dioptase crystals (up to 8 mm long), together with minute, botryoidal malachite crystals, sit on a matrix of quartz and planchéite.

Some of the dioptase crystals on the edges are damaged.

Weight of Specimen:  18.3 g

Chemical Composition:  Cu2+SiO2(OH)2  (dioptase)
                                      Cu2+(CO3)(OH)2  (malachite) 
                                      Cu8Si8O22(OH)4•(H2O)  (planchéite)
Hardness on Mohs Scale:   (dioptase)  5
                                          (malachite)  3.5 - 4
(planchéite)  5.5                                       
Location:  Kaokoland, Northern Namibia.

Specimen Code:  NKO 013


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