Glass has been one of the materials selected for its decorative purposes since early mankind. Its production was complex and varied all around the world, considering the sources of local materials used for its production as well technological knowledge about the manufacturing process. The aim of this work is to put some light on glass jewelry unearthed during the archeological excavations at the Main Market Square in Kraków, and to increase the importance of a stratifications investigation of ancient subjects by induced corrosion, using glass sensors.The collected data helps to determinate the definitive condition of a historical object. This data will also help to establish the chemical nature of the corrosion products and the altered glass and metal surfaces. Moreover, the ring presented in this work can be considered to be from a small group of fine medieval jewelry corresponding to the upper class of the population, such as the nobility or wealthy merchants. Such individuals dealt with the exchange of goods with foreign countries. Because of a very limited amount of analytical material, only nondestructive analysis: scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDXS), X-ray diffraction (XRD), X-ray fluorescence spectrometry (XRF), glass sensors were applied. The glass and metal have been tested separately.

The primary fluid inclusions, which may be helpful in detemining the chemical composition of brines in the Badenian evaporite basin, were found in the chevron halite crystals from the Transcarpathian Basin (Ukraine). Fluid inclusions in sedimentary halite were examined with the use of ultra-microchemical analysis. Concentration of brines was high – close to the middle stage of halite sedimentation. The content of ions: K+ ranged from 10.6 g/l to 17.6 g/l, Mg2+ from 31.4 g/l to 58.3 g/l, and SO4 2– from 22.4 g/l to 39.0 g/l. Based on the chemical composition of major ions it was concluded that the brine from the Transcarpathian basin was saturated (to the stage of halite crystallization) and was similar to the Badenian brines from other basins.

The EU Directives implementing the climate and energy package will result in the increased demand for natural gas in all EU countries, especially in Poland, whose energy management is coal-based. In the following decades we will observe the substantial increase in demand for natural gas as an energy carrier in power and heating sectors. Another factor, which will contribute to the increase in gas consumption, is the expansion of gas transmission and distribution network. In order to secure natural gas supply for the customers in is necessary to ensure the proper gas storage capacity, expand the existing underground gas storage facilities (UGS) and build new ones. Currently used Polish underground natural gas storage facilities allow storing 1.6 billion m3. Taking into consideration the expansion of investments in underground natural gas storage facilities and the projected increase in demand for natural gas, it is justified to build the new large salt cavern underground gas storage facility in Poland.