A Study on Beryl in the Cuonadong Be-W-Sn Polymetallic Deposit, Longzi County, Tibet, China

Recently, aquamarine was discovered in the Cuonadong Be-W-Sn Polymetallic Deposit, Longzi County, Tibet. Longzi aquamarine is being extracted and is expected to be available over the next decade. This study provides a full set of data through standard gemmological properties, including scenes, color characteristics and advanced spectroscopic and chemical analyses, including micro ultraviolet-visible-near-infrared (UV-Vis-NIR), Raman and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). The main inclusions in Longzi aquamarine are gas-liquid inclusions and a great number of quartz inclusions. The content of type I H2O is greater than that of type II H2O because of the low-alkali metal content, and tetrahedral substitutions and octahedral substitutions exist at the same time.

Automated summary

This study provides a comprehensive analysis of the aquamarine found in the Cuonadong Be-W-Sn Polymetallic Deposit in Longzi County, Tibet, including its gemmological properties and inclusions. The aquamarine is characterized by a higher content of type I H2O due to low-alkali metal content, with tetrahedral and octahedral substitutions present.