Friday, 15 July 2011

Amethyst ~

Amethyst is a well-known gemstone and widely available.  Like much commonly sold quartz it is often colour-enhanced, either by heat treatments or dying processes.


The cluster above is handsome, but with regard to natural colouration I'm more inclined to trust the look of pale specimens such as the one below as pale colours seem to be considered less attractive:

Having said that, amethyst occurs in many different shades and intensities of colour, as can be seen in this group of jewellery:


The detail below shows some of the beads from the necklace shown in the centre.  I was told those amethyst are Siberian in origin.  The strong magenta glow which can be seen when the beads are held up to the light is most unusual.  You can see an indication of it here:


This dramatic cluster is large:


A close look at some of the points shows spots of goldish colouring, which is likely to be citrine.


When citrine and amethyst occur together in the same gem, that gem is called ametrine.  I've written about this gem in a separate entry.  Given its minor presence here I don't know if this piece would be classed as ametrine or not.  It was sold to me as amethyst by a knowledgeable retailer. 

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