CIRAM carries out microanalysis of ancient stones, glass and pigments to identify their composition, origin and manufacturing process.
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Microanalysis is the very small-scale study of materials such as stone, glass or mineral pigments. It enables us to identify their elemental composition, crystalline structure and any surface or internal alterations.
Used in archaeology, art history and industry, this method of characterization method is an essential step in :
Our teams use a combination of sophisticated analytical techniques to deliver reliable, documented results.
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At CIRAM, microanalysis is based on a rigorous protocol, often initiated by microscopic sampling of the work being analyzed. This sample is then prepared and subjected to various analytical tests, depending on the needs of the project.
In 3 out of 4 cases, the use of SEM-EDX (scanning electron microscopy coupled with X-ray elemental analysis) alone is sufficient to obtain reliable, usable results. This technique offers both fine visualization of the surface and precise chemical analysis of the elements present, even at trace levels.
Where necessary, it can be supplemented by other methods such as :
This cross-disciplinary approach provides 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, and any recent interventions.
Thanks to SEM-EDX and X-ray diffraction, it is possible to :
This method is particularly useful for confirming the authenticity of a sculpture and trace its material history.
The antique glass - whether from stained glass, ritual objects or archaeological crockery - is a composite material, whose composition reveals the period and technique of manufacture. CIRAM analyzes objects in blown, molded or painted glass, in order to :
Analysis is crucial to distinguish an original medieval stained glass window from a 19th-century reproduction, for example.
The pigments are central to the analysis of painted works, wall frescoes, illuminated manuscripts and polychrome objects.
Microanalysis allows us 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 :
CIRAM is now recognized as an expert in the field of microanalysis, offering high-level scientific expertise in the analysis and characterization of ancient stones, glass and pigments. With over 20 years' experience, our laboratory is a privileged partner for archaeologistsarchaeologists art market and industry.
What sets us apart is our multidisciplinary approach, combining cutting-edge technical skills (such asorganic materials analysisanalysis metallography), state-of-the-art equipment and a team of specialized researchers, including PhDs in applied sciences, to ensure the accuracy 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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