| 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).
Archive of previous news letters (Dutch only).
Nieuwsbrief No. 1 2013
Nieuwsbrief No. 2 2013
Nieuwsbrief No. 3 2013
Nieuwsbrief No. 4 2013
Nieuwsbrief No. 5 2013
Nieuwsbrief No. 6 2013
Nieuwsbrief No. 1 2014
Nieuwsbrief No. 2 2014
Nieuwsbrief No. 3 2014
Nieuwsbrief No. 4 2014