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Victorian jewellery originated in England; it was produced during the Victoria era, when Queen Victoria reigned from 1837 to 1901. Queen Victoria was an influential figure who established the different trends in Victorian jewellery. [1]
Ternary plot of different colors of Ag–Au–Cu alloys [1]. Colored gold is the name given to any gold that has been treated using techniques to change its natural color. Pure gold is slightly reddish yellow in color, [2] but colored gold can come in a variety of different colors by alloying it with different elements.
Tanzanite is only found in Simanjiro District of Manyara Region in Tanzania, in a very small mining area approximately 7 km (4.3 mi) long and 2 km (1.2 mi) wide [4] near the Mererani Hills. [5] Tanzanite is noted for its remarkably strong trichroism, appearing alternately blue, violet and burgundy depending on crystal orientation. [6]
By 1500 BC, the peoples of the Indus Valley were creating gold earrings and necklaces, bead necklaces, and metallic bangles. [citation needed] Before 2100 BC, prior to the period when metals were widely used, the largest jewellery trade in the Indus Valley region was the bead trade. Beads in the Indus Valley were made using simple techniques.
International mining companies dominate the industry in the extraction of gold and diamonds, with additional small scale mining operations scattered across the country. [ 2 ] Tanzania is the fourth-largest gold miner in Africa behind South Africa , Mali , and Ghana , [ 4 ] and in 2010 accounted for 2% of the world's gold output. [ 7 ]
In 2014, she won a gold medal at the International Olympiad in Informatics, the most prestigious high school coding contest in the world, and later earned a scholarship to study pure mathematics ...
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