Improvements to the analytical protocol of lapis lazuli provenance: First study on Myanmar rock samples

Vaggelli, G.; Sebar, Leila Es; Borghi, Alessandro; Cossio, Roberto; Re, Alessandro; Fantino, Fulvio; Giudice, A. Lo

doi:10.1140/epjp/i2019-12523-4

Cited by 10 publications

(14 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compositional data point analyses were collected using a SEM JEOL IT300LV equipped with an energy-dispersive X-ray spectrometer (EDX), with a SDD (a silicon drift detector from Oxford Instruments), hosted at the Earth Science Department of the University of Turin and already used for different applications (Vaggelli et al 2019).…”

Section: Scanning Electron Microscopementioning

confidence: 99%

Some insight into “bronze quadrigati”: a multi-analytical approach

Debernardi¹,

Corsi

Borghi

et al. 2022

Archaeol Anthropol Sci

Self Cite

View full text Add to dashboard Cite

One of the more obscure areas of Roman Republican early coinage are debased quadrigati, which traditionally are deemed to represent the last stage of this coin type. Starting from a pre-screening, based on low specific gravity samples, we first performed neutron diffraction analyses on a larger sample, which allowed us to single out the more debased series. Subsequently, we focused on those series and applied various additional physical investigations on 18 specimens. The focus of this paper is 17 samples displaying very low silver content. They all belong to a very particular group, refereed as “Apulian” quadrigati in previous literature. They are selected for their numismatic differences and to put in evidence the relevant details of their silver quality, which ranges from “apparently good” to “plain bronze.” In this work, we combine rigorous analytical investigations like X-ray fluorescence (both ordinary and micro-), scanning electron microscope, and neutron diffraction to our accurate numismatic classification of the specimens, leading to a clear correlation between series and debasement. This work aims in particular to gain better insights into these mysterious “silver” emissions, bringing new results that can disclose unknown financial and political facts pertaining to the Second Punic War.

show abstract

Section: Scanning Electron Microscopementioning

confidence: 99%

Some insight into “bronze quadrigati”: a multi-analytical approach

Debernardi¹,

Corsi

Borghi

et al. 2022

Archaeol Anthropol Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…Since ancient times, natural ultramarine has been obtained by grinding and purifying the semi-precious stone lapis lazuli (from the Latin lapis, stone, and lazalus, a latinized form of the Persian word for blue) [9]. Lapis lazuli is generically classified as a metamorphic rock, even if this definition could not be considered exhaustive, due to the complexity of mechanisms involved in its genesis [10]. Its blue colour is essentially due to the mineral called lazurite; in addition to lazurite, lapis lazuli is composed of several minerals whose presence and relative quantity varies according to the deposits of origin.…”

Section: Ultramarine and Azuritementioning

confidence: 99%

Revealing Artists’ Collaboration in a 14th Century Manuscript by Non-Invasive Analyses

et al. 2021

View full text Add to dashboard Cite

In the last decades, the working methods of late medieval illuminators have been widely discussed by art historians and codicologists. Non-invasive analyses are able to characterise the painting methods of illuminators as well as investigate artistic collaborations among them. The aim of this study was to characterise the painting palettes and techniques of different artists who illuminated two leaves from an early fourteenth century manuscript. The analyses were carried out with non-invasive and portable techniques such as Energy Dispersive X-ray Fluorescence (ED-XRF) spectrometry, Fiber Optics Reflectance Spectroscopy (FORS) and Raman spectroscopy. The paper highlights the differences among three rich and varied palettes and examines the pigments ultramarine, azurite, verdigris, earths, orpiment, red lead, vermillion, lead white, yellow lake, indigo, brazilwood and lac, used independently or in mixtures. We have demonstrated the effectiveness of non-invasive analyses as a tool to differentiate hands of artists who have worked on the same page. Furthermore, the comparison with analyses carried out on leaves attributed to the workshop of Pacino di Bonaguida allows to investigate in-depth the production of the main illuminators active in Florence at the dawn of the Renaissance.

show abstract

“…Petrographic analysis by optical microscope and SEM, together with the minero-chemical analysis of the main and accessory minerals by EDS microanalysis and the micro X-ray florescence determination of trace elements were used to characterise six samples representative of two historical quarries (Table 1). Petrographic analyses were carried out on polished thin sections, using a Cambridge S360 scanning electron microscope, according to the analytical conditions reported in [16]. In particular, the working distance was 25 mm; the probe current was 200 pA; the accelerating potential was 15 kV; the counting time resulted of 60 s. All the analyses were recalculated with MINSORT program by Petrakakis and Dietrich [17].…”

Section: Petrographic and Geochemical Characterisationmentioning

confidence: 99%

The Candoglia Marble and the “Veneranda Fabbrica del Duomo di Milano”: A Renowned Georesource to Be Potentially Designed as Global Heritage Stone

et al. 2019

View full text Add to dashboard Cite

Marbles from Alpine area have been widely employed to build and decorate masterpieces and buildings which often represent the cultural heritage of an area (statuary, historic buildings and sculptures). Candoglia marble, object of the present research, is one of the most famous and appreciated marbles from Alpine area; it has been quarried since Roman times in the Verbano-Cusio-Ossola (VCO; Piemonte – NW Italy) extractive area. Candoglia Marble outcrops are present as lenses within the high-grade paragneisses of the Ivrea Zone, a visible section of deep continental crust characterised by amphibolite- to granulite-facies metamorphism (Palaeozoic period). Candoglia calcitic marble (80–85% CaCO3 and the 15–20% other minerals) shows a characteristic pink to gray colour and a coarse-grained texture (>3 mm): frequent centimetre-thick dark-greenish silicate layers (mainly represented by diopside and tremolite) characterize the texture of the marble. It has been largely used in local rural constructions and historical buildings, but its most famous application has been (and still is) for the “Duomo di Milano” construction (fourteenth century). The Veneranda Fabbrica del Duomo di Milano carried out the anthropogenic activities dealing with the Candoglia marble exploitation; it has to be highlighted that the company have managed the Marble exploitation during the last seven centuries and that the quarry itself is a tangible sign of the development of extraction and heritage in the VCO area. Candoglia marble can be recognized as a significant example of a “Global Heritage Stone Resource”: its exploitation from quarry to building (the Duomo di Milano) well represents the close correlation between stone and cultural heritage, between georesources and humankind development

show abstract

Improvements to the analytical protocol of lapis lazuli provenance: First study on Myanmar rock samples

Cited by 10 publications

References 23 publications

Some insight into “bronze quadrigati”: a multi-analytical approach

Some insight into “bronze quadrigati”: a multi-analytical approach

Revealing Artists’ Collaboration in a 14th Century Manuscript by Non-Invasive Analyses

The Candoglia Marble and the “Veneranda Fabbrica del Duomo di Milano”: A Renowned Georesource to Be Potentially Designed as Global Heritage Stone

Contact Info

Product

Resources

About