CIRAM performs microanalysis of ancient stones, glasses, and pigments to identify their composition, origin, and manufacturing process.
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Microanalysis refers to the study of materials such as stone, glass, or mineral pigments on a very small scale. It allows for the identification of their elemental composition, crystalline structure, and any surface or internal alterations.
Used in archaeology, art history, and industry, this characterization method is an essential step for:
Our teams use a combination of sophisticated analytical techniques to deliver reliable, documented results.
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At CIRAM, microanalysis relies on a rigorous protocol, often initiated by microscopic sampling of the analyzed work. This sample is then prepared and subjected to various analytical examinations according to project needs.
In 3 out of 4 cases, the sole use of SEM-EDX (Scanning Electron Microscopy coupled with Energy Dispersive X-ray Spectroscopy) is sufficient to obtain reliable and usable results. This technique offers both fine surface visualization and precise chemical analysis of the elements present, even in trace amounts.
When necessary, it can be supplemented by other methods such as:
This cross-disciplinary approach allows for a complete reading of the materials studied, by cross-referencing chemical, mineralogical, and morphological data – essential for distinguishing an ancient material from a modern fabrication or a poorly documented restoration.
Request a quoteThe study of stone sculptures aims to identify the exact nature of the rock (limestone, marble, sandstone, etc.), its potential geographical origin, as well as any recent interventions.
Thanks to MEB-EDX and X-ray diffraction, it is possible to:
This method is particularly useful for confirming the authenticity of a sculpture and tracing its material history.
The ancient glass – whether from stained glass windows, ritual objects, or archaeological tableware – is a composite material, the composition of which reveals the period and manufacturing technique. CIRAM analyzes blown, molded, or painted glass objects, in order to:
Analysis is crucial to distinguish an original medieval stained glass window from a 19th-century reproduction, for example.
Pigments are at the heart of the analysis of painted works, wall frescoes, illuminated manuscripts, or polychrome objects.
Microanalysis makes it possible to characterize the composition of pigments (natural or synthetic), their binders, and any mixtures made by the artist. Using techniques such as Raman spectroscopy, FTIR, or SEM-EDX, CIRAM identifies the major and trace elements that make up a pigment: copper, mercury, iron, lead, arsenic, etc.
This analysis makes it possible to :
CIRAMis today recognized as an expert in the field of microanalysis, offering high-level scientific expertise for the analysis and characterization of ancient stones, glasses, and pigments. With over 20 years of experience, our laboratory is a preferred partner for archaeologists, professionals in the art market, and the industry.
We distinguish ourselves through our multidisciplinary approach, combining cutting-edge technical skills (such as organic material analysis, metallography), state-of-the-art equipment, and a team of specialized researchers, including doctors in applied sciences, who ensure the precision and reliability of our analyses.
Contact our teamsAny artifact containing inorganic materials (glass, stone, pigment): statues, jewelry, mosaics, painted objects, architectural fragments...
No, in most cases we prefer non-destructive techniques. If sampling is necessary, it is minimal and carried out with care.
Yes, the chemical composition of glass can be compared with regional and chronological production databases.
By identifying synthetic pigments that are modern or inconsistent with the supposed period.
Prices depend on the type of object, the materials involved and the techniques required. Contact us for a personalized quote.
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