Gurasada agate
Gurasada agate is a beautiful mineral specimen from the Gurasada region of Romania. Agate is a ribbon-shaped chalcedony (a subspecies of quartz), the strips of which can be parallel or concentric. This agate is usually embedded in diabase, a fine to medium-grained intrusive igneous rock that is usually dark gray to black in color. This polished agate specimen measures 9 x 8.5 x 8cm and has a chemical composition of silicon dioxide (SiO₂).
C ă limani sulfur
The large chunks of sulfur from the C ă limani open-pit mine in Romania are a mineral found in the C ă limani volcanic mountain range. This open-pit mine is located in Suceava County, Romania. It was once a large sulfur mine that began in 1969 and was closed from 1992 to 1995. The chemical formula of sulfur is S, and pure sulfur appears bright yellow. Pure sulfur is usually bright yellow, but its color may change due to impurities such as clay and selenium impurities, which can cause it to appear red, green, brown, or gray. The C ă limani open-pit mine is a volcanic sulfur deposit.
Techereu Jade
Jasper from Techereu is a mineral discovered in the Bal ș a area of Hunedoara County, Romania. Jade is an opaque rock that can appear in almost any color, depending on the mineral composition of the original sediment or volcanic ash. In the Techereu region, jadeite mainly exists in the conglomerates of the Cretaceous period, forming multicolored jadeite.
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