amethyst Význam & definice

Příklady amethyst

• The results point to a volcanic origin for the amethyst geode infillings through basalt 'autoalteration' by authigenic high temperature hydrothermal fluids.

• Keywords: basaltic flows, geodes, amethyst, geochemical profiles, fluid inclusions.

• The amethyst level is at the top of the massive central part, with 3 m maximum thickness, its lower part being at 10 m depth in the lava flow.

• Over 150 minerals have been discovered at the mine, mica being the most prevalent, but also including feldspar, beryl, amethyst, rose/smoky quartz, and garnet.

• Famous objects such as several cosmetic palettes, ivory bracelets with relief decoration and collars made of carnelian- and amethyst beads were found.

• Amethyst was considered to be a strong antidote against drunkenness, which is why wine goblets were often carved from it.

• At the front of the circlet is an oval amethyst and four amethysts alternate with four citrines on the circlet proper.

• Perucca was attempting to replicate a nineteenth-century experiment (1860) in which amethyst exhibited optical activity in the visible light spectrum.