Chalcedony from Ban Huai Di Lert, Amphoe Chai Badan, Changwat Lop Buri and Jewellery Use
Abstract
The gemmological characteristics of chalcedony from Ban Huai Di Lert, Amphoe Chai
Badan, Changwat Lop Buri, Thailand have been done for the white, pink, green and black samples
(16 samples). Polariscope study gave the translucent aggregate character for white samples but the
rest are opaque. The average RI of the samples by a refractometer is 1.545 and the average specific
gravity by an electrical balance is 2.580. The spectroscopy study by the Raman microprobe of the
samples shows the major peaks at 462, 463, 464 and 466 cm-1. The samples were set in metals and
they can be used as ordinary jewellery.
Badan, Changwat Lop Buri, Thailand have been done for the white, pink, green and black samples
(16 samples). Polariscope study gave the translucent aggregate character for white samples but the
rest are opaque. The average RI of the samples by a refractometer is 1.545 and the average specific
gravity by an electrical balance is 2.580. The spectroscopy study by the Raman microprobe of the
samples shows the major peaks at 462, 463, 464 and 466 cm-1. The samples were set in metals and
they can be used as ordinary jewellery.
Keywords: Chalcedony, Lop Buri, Gemological characteristics, Jewellery, Spectroscopy
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