Choudhary G. (2015) A Remarkably Large Amblygonite-Montebrasite Carving. Gems & Gemology, Vol. 51, No.1, pp 98-99

Report on an unusually large yellow coloured carving weighing 1,871 grams, which was identified as belonging to the amblygonite-montebrasite series. This gem species is not seen frequently and is known by only few members of the trade. This report outlines the properties of the carving, while Raman spectroscopy proved to be the most important tool in correct identification of this material.