• 1
  • 2
  • 3
Come to where the knowledge is! Deutsche Gemmologische Gesellschaft eV (German Gemmological Association)

We are pleased to inform you that the DGemG-information, which we’ve been publishing quarterly in German since the beginning of 2016, is now gradually being available in English as well.

 

Januar Posting Newsletter english borax klein

In the picture above you see a fissure in a ruby (transmitted light, x40, FOV approx. 4 mm), which has been healed artificially during the thermal enhancement. In addition to the colour improvement, this method also improves significantly the transparency of the material.
The DGemG-information “Corundum with artificially healed fissures” presents the treatment process, the identification as well as the nomenclature required for this enhancement.

 

Content

1. Introduction

2. Chemical additives and treatment process

3. Identification

4. Filling of fractures and cavities

5. Nomenclature

6. Literature

 

The entire article is available here:

DGemG-information: Corundum with artificially healed fissures

 

 

We are pleased to inform you that the DGemG-information, which we’ve been publishing quarterly in German since the beginning of 2016, is now gradually being available in English as well.

In the picture you see a fissure in a ruby (transmitted light, x40, FOV approx. 4 mm), which has been healed artificially during the thermal enhancement. In addition to the colour improvement, this method also improves significantly the transparency of the material.
The DGemG-information “Corundum with artificially healed fissures” presents the treatment process, the identification as well as the nomenclature required for this enhancement.

The entire article is available here:

DGemG News

CIBJO Congress 2018

Die diesjährige CIBJO-Konferenz fand vom 15. Bis 17. Oktober in Bogota, Kolumbien im unmittelbaren Anschluss an das 2nd World...
Mehr lesen...

2. DGemG-Arbeitstagung 2018

Alexandrit war das Thema der 2. Arbeitstagung der Deutschen Gemmologischen Gesellschaft e.V., die am 29. September 2018 im...
Mehr lesen...

Zweifarbiger Mikroklin aus Brasilien

Feldspäte sind im Allgemeinen für ihre besonderen optischen Effekte bekannt (Adularisieren, Labradorisieren, Aventurisieren),...
Mehr lesen...

DGemG-Information: Raritäten bei...

Neben den klassischen perlenbildenden Meeresmuscheln Pinctada imbricata, Pinctada fucata, Pinctada margaritifera, Pinctada...
Mehr lesen...

2. Arbeitstagung 2018

2. Arbeitstagung 2018 Samstag, 29. September 2018 DGemG-Ausbildungszentrum in Idar-Oberstein (Deutsches Gemmologisches...
Mehr lesen...

DGemG-Information: Turmaline aus dem...

Seit etwa 20 Jahren werden im Osten der Demokratischen Republik Kongo Turmaline in Edelsteinqualität zumeist im Kleinbergbau...
Mehr lesen...