Labratorial Studies on the Blue and Green Beads Used in the Prehistoric Ornaments of National Museum of Iran

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BAHADORI ROYA; AGHA ALIGOL DAVOUD

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Journal: PAZHOHESH-HA-YE BASTANSHENASI IRAN Year:2018 | Volume:8 | Issue:18 Page(s): 45-62

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Title

Labratorial Studies on the Blue and Green Beads Used in the Prehistoric Ornaments of National Museum of Iran

Author(s)

BAHADORI ROYA | AGHA ALIGOL DAVOUD | Issue Writer Certificate

Keywords

BeadQ2

OrnamentQ1

Lapis LazulQ1

Micro-PIXEQ1

FTIRQ1

PLMQ1

XRDQ1

Abstract

In this work, eight samples in blue, dark blue and green colors that used in three Ornaments were analyzed by multi-analytical techniques. One of these artifacts was obtained from the Tepe Hissar, Damghan dated to 3rd millennium BC and two other ones were excavated in the Tepe Nesfi, Gilan dated to first millennium BC and these Ornaments belong to the National Museum of Iran. The aims of this study were the identification and characterization of the raw materials, opacifier and colorant agents used in the Bead’ s samples. Determination and measurement of each of these factors respond to questions raised about the technology and manufacturing recipe, type of the glass and investigation of trade and exchange of Beads in prehistoric times. Techniques such as XRD, FTIR, Micro-PIXE and Polarized Light Microscopic (PLM) were applied to characterize the samples. FTIR and Micro-PIXE analysis of the blue Bead was used in Ornaments of Tepe Hesar showed that Lapis Lazuli used to make the Beads. It is a semi-precious stone, and due to the high levels of magnesium and calcium in it, this sample has a considerable mineral content of diopside (CaMgSi2O6). The result of XRD spectra and PLM image of the seven samples of two necklaces of Tepe Nesfi showed that these samples lacked a crystalline structure, indicating the glass structure of the specimens. Elemental composition of the samples of Tepe Nesfi by Micro-PIXE show that the all analyzed samples are soda-lime-silica glasses, which is the ash obtained from the plants are considered as the soda source, due to the high potassium and magnesium content. In addition, the results indicated that in these glass Beads copper and iron compounds with different weight percentages were used as a colorant agents. Furthermore, antimony (Sb) compounds were used as opacifier in blue Beads, but in the dark blue and green glass Beads that are translucent glass do not detect any antimony compounds.

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APA: Copy

BAHADORI, ROYA, & AGHA ALIGOL, DAVOUD. (2018). Labratorial Studies on the Blue and Green Beads Used in the Prehistoric Ornaments of National Museum of Iran. PAZHOHESH-HA-YE BASTANSHENASI IRAN, 8(18 ), 45-62. SID. https://sid.ir/paper/245061/en

Vancouver: Copy

BAHADORI ROYA, AGHA ALIGOL DAVOUD. Labratorial Studies on the Blue and Green Beads Used in the Prehistoric Ornaments of National Museum of Iran. PAZHOHESH-HA-YE BASTANSHENASI IRAN[Internet]. 2018;8(18 ):45-62. Available from: https://sid.ir/paper/245061/en

IEEE: Copy

ROYA BAHADORI, and DAVOUD AGHA ALIGOL, “Labratorial Studies on the Blue and Green Beads Used in the Prehistoric Ornaments of National Museum of Iran,” PAZHOHESH-HA-YE BASTANSHENASI IRAN, vol. 8, no. 18 , pp. 45–62, 2018, [Online]. Available: https://sid.ir/paper/245061/en

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