Mineralogy and Gemology Studies

Abstract Vibrational spectroscopy has been widely used to investigate various structural aspects of the glass network, and there are a plethora of papers reporting subtle but consistent changes in infrared and Raman spectral features of glass upon alterations of glass compositions, thermal histories, mechanical stress…

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• GÜLTEKİN TOPUZ

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• MEHMET KERİM RAMAZANOĞLU

Abstract The diatomaceous earth (DE), collected from the Mariovo region in North Macedonia, was characterized and thermally modified. The material represents a sedimentary rock of biogenic origin, soft solid that can be easily disintegrated, with white to grayish color, with bulk density of 0.51–0.55 g/cm3, total poro…

• AYHAN ORAL
• KADİR AY

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• SERVET TURAN

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• MUSTAFA KUMRAL

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• HİLMİ YURDAKUL

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• NECATİ KARAKAYA

Minerals able to colour in blue (and green in combination with yellow pigments) are limited in number and geologically. After presenting a short history of the use of cobalt as a colouring agent of glass, glaze and enamel in the Western/Mediterranean, Islamic and Asian worlds since Antiquity, we will present the diffe…

Abstract A selection of 22 rare Chinese cloisonné enamels, from fifteenth century to nineteenth century A.D., has been studied on‐site in the storage rooms of the musée des Arts décoratifs in Paris. The Raman signatures of the transparent and/or opacified glass matrix are discussed and compared with those that were pr…

• BURCU KIRMIZI

Luminescence sensitivity changes in natural quartz induced by high temperature annealing: a high frequency EPR and OSL study, N R J Poolton, G M Smith, P C Riedi, E Bulur, L Bøtter-Jensen, A S Murray, M Adrian

• ENVER BULUR

Widespread chemical weathering of Tertiary alkaline volcanic rocks in the vicinity of Trabzon (NE Turkey) has led to the formation of well developed reddish-brown saprolite. These saprolites are dominated by kaolin minerals (predominantly kaolinite), with minor quantities of halloysite, pyrophyllite, chlorite, smectit…

• EMEL ABDİOĞLU YAZAR