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Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation in order to enhance its optical properties.High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [1]
A crystal cluster is a group of crystals which are formed in an open space environment and exhibit euhedral crystal form determined by their internal crystal structure. [ 1 ] [ 2 ] A cluster of small crystals coating the walls of a cavity are called druse .
The Empress of Uruguay is the world's largest amethyst geode, standing at a height of 3.27 meters. It is open along its length and weighs 2.5 tons in its current state. It was discovered in 2007 in the Artigas department, Uruguay by the Uruguayan mining company Le Stage Minerals.
Heat can either improve or spoil gemstone color or clarity. The heating process has been well known to gem miners and cutters for centuries, and in many stone types heating is a common practice. Most citrine is made by heating amethyst, and partial heating with a strong gradient results in "ametrine" – a stone partly amethyst and partly citrine.
The ridge is known for its abundance of amethyst, opal and petrified wood. It was referred to as Specimen Mountain by local miners and was probably named by prospectors well before 1870. [ 2 ] The south side of the ridge is traversed by the 18.8-mile (30.3 km) Specimen Ridge Trail between Tower Junction and Soda Butte Creek .
Amethyst is a violet variety of quartz.The name comes from the Koine Greek αμέθυστος amethystos from α - a-, "not" and μεθύσκω (Ancient Greek) methysko / μεθώ metho (Modern Greek), "intoxicate", a reference to the belief that the stone protected its owner from drunkenness. [1]
The mines subsequently developed on the Amethyst vein included the Bachelor, the Annie Rooney, the Sunnyside, and the Commodore. Creede's share of the Amethyst mining operation was well over a million dollars, with some sources placing his daily income from the Amethyst and related properties at US$1,000 ($27,000 US 2011) per day in 1892. [11]
Amethyst cluster from Magaliesburg . Magaliesburg is a small town situated below the Witwatersrand mountain range in Gauteng, South Africa. The Magaliesberg mountain range is north and visible from town, hence the name "Magaliesburg". The mountains themselves are named after Kgosi Môgale Wa Môgale, a MoTswana chief of the BaPô ba Mogale clan.