Affiliation:
1. Department of Geology, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur-522510, Andhra Pradesh, India
Abstract
Aquamarine gemstone is one of the Beryl mineral varieties with Beryllium aluminium silicate composition. Its bluish green color caused from Fe2+ions puts it as a special variety. It is used in jewellery and has some industrial applications. This beautiful gemstone is reported from few countries only, namely India, Brazil, Canada, China, Italy, Pakistan, Russia, Ethiopia, Madagascar, Mozambique, Namibia, Nigeria, United Kingdom, United States, Mexico and Vietnam. The present study collected its occurrences from various parts of the world and studied the variation of oxides analyzed from Aquamarine. It is observed that SiO2 ranges from 64.99% to 72.48%, Al2O3:11.63% to 19.91%; BeO: 12.9% to 13.79%; FeO: 0.11% to 5.03%; CaO:0.01 %to 0.83%;MgO:0.00% to 1.93%; Na2O:0.10% to 3.53%; K2O:nearly zero to 3.31% and MnO:0.00% to 0.06%.
Reference57 articles.
1. Adamo Ilaria, Alessandro Pavese, LoredanaProsperi, Valeria Diella, David Ajò, G. Diego Gatta, and Christopher P. Smith (2008) Aquamarine, Maxixe-Type Beryl, and Hydrothermal Synthetic Blue Beryl: Analysis and Identification, Gems & Gemology, Fall, 214-226
2. Agheem Muhammad Hassan, Mohammad Tahir Shah, Tahseenullah Khan, Mamoru Murata, Muhammad Arif and HumairaDars (2014) Shigar valley gemstones, their chemical composition and origin, Skardu, Gilgit-Baltistan, Pakistan, Arab J Geosci 7:3801–3814
3. Ahline Nicole and Maryam Mastery Salimi (2017) Mysterious Iridescence in Aquamarine, Gems and Gemmology, 53, 240-241
4. Badar M A, Safdar Hussain1, Shanawer Niaz, Saif Ur Rehman (2017) X-ray Diffraction Study of Aquamarine from Shigar Deposits, Skardu Valley, Northwest Pakistan, Int. J. Econ. Environ. Geol. 8 (4)33-40
5. Bank Francisco, Professor Hermann Bank and Elena Villa (2001) Santa Maria aquamarine, The Journal of gemmology, 27 (5) 257-258