نتایج جستجو برای: gemstone

تعداد نتایج: 218  

Journal: :Crystals 2022

Madagascar is known as the ‘Island of Gemstones’ because it full gemstone resources. Apatite from widely popular its greenish blue Paraiba-like color. This study analyzes apatite through standard gemological characteristic methods, spectroscopic tests and chemical analyses (i.e., electron probe laser ablation inductively coupled plasma mass spectrometry). work explores diagenesis information re...

Journal: :Crystals 2023

Fluorite has been attracting the attention of gemstone mineralogists because its rich color and excellent fluorescence properties. This paper studied fluorite with three types (blue, green, white) five blue-purple fluorites an alexandrite effect. Through study their structure, composition, spectral characteristics, gemological mineralogical characteristics coloration mechanisms different are co...

2018
Oluwatosin Gbemisola Oladipo Olusegun Olufemi Awotoye Akinyemi Olayinka Cornelius Carlos Bezuidenhout Mark Steve Maboeta

Increased environmental pollution has necessitated the need for eco-friendly clean-up strategies. Filamentous fungal species from gold and gemstone mine site soils were isolated, identified and assessed for their tolerance to varied heavy metal concentrations of cadmium (Cd), copper (Cu), lead (Pb), arsenic (As) and iron (Fe). The identities of the fungal strains were determined based on the in...

Journal: :Optics and Spectroscopy 2022

Laser-induced breakdown spectroscopy (LIBS) is emerging as an analytical tool for investigating geological materials. The unique abilities of this technique proven its potential in the area geology. Detection light elements, portability in-field analysis, spot detection, and no sample preparation are some features that make appropriate study application LIBS has been tremendously developed rece...

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