In this study, we show a simple two-step surface engineering method that uses chemical
oxidation (using KOH and NaClO in 1: 2 M ratio)-assisted leaching of metals (Cr, Mn, and Ni) …

Raman spectra of 42 minerals, commonly and less frequently used as gemstones in
gemmology ss or works of arts, have been recorded using a portable sequentially shifted …

Micro-Raman spectra of concretions with and without fossils were measured in a
nondestructive manner. The band position and full width at half maximum height (FWHM) of …

Frequently, the study of modern and contemporary paintings requires the taking of micro-
samples to gain an in-depth understanding of the employed materials and techniques …

The paper presents comprehensive mineralogical and geochemical characteristics of
Dominican amber-bearing sediments from Siete Cañadas, Hato Mayor Province of the …

Abstract A complete Middle Stone Age ochre piece was unintentionally collected and fully
preserved within a micromorphological block sample intended to characterise a 74±3 ka …

In the present study, rough emerald single crystals and rough emeralds in the host rock from
the ruins of Alexandria and from the Mount Zabargad in Egypt, preserved in the collection of …

The accumulation of mineral deposits such as black powder causes severe impacts
throughout the gas production and transport process. The phenomenon takes place from …

Natural stone can undergo disaggregation from various causes, including physical actions
such as freeze–thaw cycles, temperature and humidity variations, chemical actions such as …

With the development of technology and methodologies, Raman spectrometers are
becoming efficient candidate payloads for planetary materials characterizations in deep …