FAAS, FT-IR and XRD Identification of Natural and Heat Treated Opals Located in Wadla Woreda, North Wello, Ethiopia
Adere Tarekegne Habte, Shiferaw Dessie Mekonnen, Adugna Nigatu Alene & Gietu Yirga Abate · Asian Journal of Applied Chemistry Research · 2020
Opals are naturally occurring hydrous silica materials (SiO2*nH2O), and have been largely used in jewelry and as decorative elements in artworks due to their optical properties. In this study, we present some gemological properties, a combined spectroscopic (FAAS, FTIR) and X-ray...
Open access
Research Article
10.9734/ajacr/2020/v7i130171