![emerald cut magnesite from Brazil](https://www.patrickvoillot.com/wp-content/uploads/2021/03/magnesite-taille-emeraude-bresil131.png)
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![emerald cut magnesite from Brazil](https://www.patrickvoillot.com/wp-content/uploads/2021/03/magnesite-taille-emeraude-bresil131.png)
![leucophanite fancy cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/leucophanite-taille-fantaisie137.png)
leucophanite
Its name comes from the Greek “Leucos” which means white and “phanen”, “which appears” in connection with its color often white. It was discovered in 1840 in Norway.
![herderite crystal from Minas Gerais in Brazil](https://www.patrickvoillot.com/wp-content/uploads/2021/03/herderite-cristal-minas-gerais-bresil161.png)
hydroxylherderite
Its name honors Siegmund August Wolfgang von Herder (1776-1838) who identified it. It is found associated with herderite, besides many specimens called herderite are actually of hydroxylherderite.
![hodgkinsonite fancy cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/hodgkinsonite-taille-fantaisie156.png)
hodgkinsonite
Discovered in 1913, its name honors H.H.Hodgkinson of the Franklin Mine in New Jersey, United States, where it was discovered.
![emerald cut hiddenite from Brazil](https://www.patrickvoillot.com/wp-content/uploads/2021/03/hiddenite-taille-emeraude-bresil157.png)
hiddenite
This is a green variety, colored by chromium, of spodumene which is part of the pyroxene group, although green spodumene without chromium are also called Hiddenite. Its name honors W. E. Hidden, who discovered it in 1879 in the U.S. (Alexander County, North Carolina United
![gaylussite crystals from Ambola lake in kenya](https://www.patrickvoillot.com/wp-content/uploads/2021/03/gaylussite-lac-amboli-kenya172.png)
gaylussite
Identified in 1826 in Venezuela, its name honors the French chemist Gay-Lussac (1778-1850).