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Amethyst
This
is a variety of quartz coloured by traces of manganese, titanium and
iron. It is of a pale lilac, mauve or bluish violet colour. Very
popular in the past, its current value is stable as new mines have
recently been discovered. Moreover, its worth has been further
undermined over recent years by the flood of tasteless objects made in
Brazil.
The best investment is an amethyst of average size weighing between 4
and 8 carats, as dark as possible, but not so much so that the light
is prevented from reflecting, and with a deep lustre.
Amethyst has a very wide provenance, but the finest coloured
specimens come from Brazil and the Urals. It is also mined in
Madagascar, Ceylon, India and Australia.
|
Name |
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| Amethyst Quartz
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7 |
2.63-2.65 |
Hexagonal
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None
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1.544-1.553
|
0.009
|
0.013
|
v Weak |
Weak |
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