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.

• There are several small surface amethyst mines in the area, some of which allow visitors to search for their own crystals.

• Small quantities of amethyst, peridot, and black opal are also produced.

• Although citrine occurs naturally, the majority is the result of heat-treated amethyst.

• The buildings were topped by amethyst domes, which were lighted at night and could be seen offshore.

• The winter hat was very dark navy felt trimmed with a navy gross grain ribbon stipped with amethyst and gold.

• Again amethyst gloves, brown lace-up shoes with beige socks or 40 denier stockings completed the ensemble.

• The beach and cliff sides are known for semi-precious gemstones, primarily varieties of agate, quartz, and amethyst.