Amethyst

  
  

A single elestial growth of quartz terminated all round with parallel and stepped crystal faces is crowned with a gemmy transparent cap of amethyst.
The body of the crystal is heavily included with silvery black needles of tourmaline.

Origin: Pohndorf Pegmatite, Pipestone District, Butte, Montana, U.S.A.

Ex. Mark Wrigley collection

Sample size: 7.9 x 3.5 x 2.8 cm

 

  

  

Chert matrix with a single doubly terminated quartz crystal that has two distinct zones of purple amethyst at the tips and a mikly quartz center portion of the crystal.

Origin: W. Shore Lake Balkhash, near Preozersk, Dzezkazgan Oblast, SE Kazakhstan

Ex. Rick Green collection

Sample size: 6.5 x 5 x 2.5 cm

 

  

  

The amethyst crystals are intermixed with quartz on top of a hemispherical hollow of quartz. The base has brown calcite crystals. The hollow of quartz is 2.3 cm across.

Origin: Pedra Parada, Las Vigas, Veracruz, Mexico

Ex. Keith Hayes collection

Sample size: 3.6 x 2.8 x 2.0 cm

 

  

  

  

Two undamaged, very well coloured parallely grown crystals ((the big one is 2.4x1 cm with hoppered tip), perched on a green basalt matrix together with millimetric dolomite and calcite crystals.

Origin: Osilo, North Sardinia, Italy

Ex. Giorgio Spiga collection

Sample size: 6 x 5 x 3 cm

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