Amethyst Quartz Crystals on Matrix - NBB 187

Two double terminated amethyst / smoky quartz crystals on matrix

Measurements:  110 x 66 x 40 mm

Description:  Two double terminated amethyst / smoky quartz crystals, together with bits of squartz and calcite, sit on a basalt matrix.  This has been trimmed on three sides, so the specimen can display well on a flat surface, in three different positions. 

Both crystals have a small, slightly raised pattern (almost droplet form) on their main termination facets, which is slightly dull (possibly chalcedony coated). Near the base of the secondary terminations of the crystals are a few small quartz crystals with numerous reddish hematite specks.

The largest quartz crystal's main termination has only a minute nick, while the other side of the same crystal has a nick of about 2 mm near the termination, and a long, narrow nick to its side. The second crystal has a flaw near its main termination and a fairly large flaw and bad nick near its lesser termination. To the side of the specimen are the remains of a broken crystal.

Weight of Specimen:  247.7 g

Chemical Composition:  SiO2  (quartz)
                                       CaCO3  (calcite)

Hardness on Mohs Scale:  (quartz)  7    
                                          (calcite)  3    

Location:  Brandberg, Namibia.

Specimen Code:  NBB 187

US $ 140

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