Questions & Information

All our gemstones are provided with a letter code.
The letters refer to an international standard for treatment, if the gemstone is treated and how it is treated.
These letters are commonly used:
N = Natural Untreated.
E = Enhanched Improved through e.g. heating.
T = Treated Treated with various methods:
T/U = Diffusion Heated with coloring additive.
T/D = Gebeitst Adding color to porous stones
T/R = Bestraald Changing color through radiation.
T/I = Gevuld Fill gemstones with glass or resin to improve clarity.
T/C = Gecoat Coating consisting of metal oxide.
T/L = Gelaserd Inclusions in diamond are dissolved with acid after a chanel is made with using laser technology.

Download this pdf-document for an overview of recommendations on wear and proccesing commonly used gemstones (Dutch only).

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Archive of previous news letters (Dutch only).

2013

Nieuwsbrief No. 1 2013
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Nieuwsbrief No. 2 2013
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Nieuwsbrief No. 3 2013
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Nieuwsbrief No. 4 2013
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Nieuwsbrief No. 5 2013
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Nieuwsbrief No. 6 2013
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2014

Nieuwsbrief No. 1 2014
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Nieuwsbrief No. 2 2014
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Nieuwsbrief No. 3 2014
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Nieuwsbrief No. 4 2014
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