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ANALYSIS OF MINERALS IN CEMPAKA-MADU GEMSTONE FROM ACEH INDONESIA BY USING XRF

Ismail ., Akmal Nizar, Mursal .

Abstract


Abstract. Cempaka-madu is a local name for one kind of gemstone from Aceh province in Indonesia. It is so attractive and its color is dark-orange. We have utilized X-Ray Florescent (XRF) to study these cempaka-madu gemstones from Aceh Tengah and Nagan Raya districts in Aceh province. Our results show that the cempaka-madu gemstone from Nagan Raya district contains 84.90% of SiO2, 8.89% of NiO, 5.47% of Fe2O3, and 0.6% of CaO. The mineral contains in cempaka-madu gemstone from Aceh Tengah district is about the same as those from Nagan Raya district. It is found that the oxide compounds contained in the cempaka-madu gemstone is significantly different than that in jadeite, nephrite-actinolite, nephrite-tremolite, serpentine-clinochrysotile, serpentine-antigoride, and vesuvianite. Consequently, we conclude that the cempaka-madu gemstone from Aceh Indonesia cannot be categorized as jade.

 

Keywords: cempaka-madu gemstone, jade, jadeite, nephrite, serpentine, vesuvianite

Keywords


cempaka-madu gemstone, jade, jadeite, nephrite, serpentine, vesuvianite

References


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Prewitt, C.T., Burnham, C.W., 1966. The crystal structure of jadeite, NaAlSi2O6. American Mineralogist 51, 956–975.

Htein, W., Naing, A.M., 1994. Mineral and chemical compositions of jadeite jade of Myanmar. Journal of Gemology 24, 269–276.

Harder, H., 1995. Trace elements as colouring agents in jadeites. The Journal of Gemology 24, 508–511.

Murat, H., Basevirgen, Y., Chamberlain, S.C., 2012, Gem Turkish purple jade: Geological and mineralogical characteristics. Journal of African Earth Science Vol 63, 48 – 61.

Aflah, N., Muchlis, Halimi, K., Nufus, H., Maysura, Z., Simatupang, M. Z. 2014. Classification of Jades (Giok) Beutong Aceh based on Mineral Composition. Journal Natural Vol.14, No.2, 19-22.

Akmal Nizar, Mursal, and Ismail, 2016, Minerals Identification of Bio-Solar Gemstone from Aceh, Journal of Aceh Physics Society, Vol. 5, No. 2, 22-26.

Ismail, Akmal Nizar, and Mursal, 2017, Minerals Identification of Black-Jade Gemstone from Aceh Indonesia, accepted for publication in IOP conference series.

webmineral.com/data/Jadiete.shtml

webmineral.com/data/Actinolite.shtml

webmineral.com/data/Tremolite.shtml

webmineral.com/data/ Clinochrysotile.shtml

webmineral.com/data/Antigorite.shtml

webmineral.com/data/Vesuvianite.shtml


Full Text: PDF

DOI: 10.24815/jn.v18i1.9802

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