| Citation: |
LI Xingtong, XU Chang, ZHENG Jinyu, SHEN Hongtao, Shen Andy Hsitien, ZHANG Qian. Gemmological and Mineralogical Characteristics of Apatite from Madagascar with Directional Inclusions[J]. Journal of Gems & Gemmology, 2024, 26(S1): 104-107.
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In this study, the apatites containing directional arrangement inclusions from Madagascar were investigated using microscope, Raman spectroscopy, scanning electron microscope (SEM), X-ray energy dispersive spectroscopy (EDS), and magnetic test. Microscopic observation results show that there are abundant needle-like inclusions with metallic luster, which are parallel to c-axis of the apatite crystal. These inclusions could produce the cat's eye effect of apatite under the light. EDS results reveal that Fe and O elements are rich in the exposed region of inclusion, suggesting that it is a type of iron oxide. Raman spectroscopy displays a weak peak at 662 cm-1, which can be attributed to the A1g vibration mode of magnetite. The hysteresis loop test confirms that the inclusions are ferromagnetic substances, indicating that the needle-like inclusions are magnetite.
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