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https://www.gold.org/about-gold/about-gold-jewellery
Yellow gold jewellery is still the most popular colour, but today gold is available in a diverse palette. The process of alloying—mixing other metals with pure 24 carat gold—gives malleable gold more durability, but can also be used to change its colour. White gold is created through alloying pure gold with white metals such as palladium or ...
https://www.callagold.com/education/gold-jewelry-alloys/
Mar 11, 2019 · White gold (and yellow gold) is measured in karats. There are 24 karats in 100% pure gold. This is too soft for jewelry making. There is 58% pure gold by weight in 14kt gold. The balance of metal is the alloy mix chosen to be combined with the pure gold. In metals purity is measured and marked by karat. This is different that carat which is the ...Reviews: 66
https://www.swissalloys.net/jewellery-gold-alloys.html
2 mm - 10 mm. Usage. To make jewellery. Features: Swiss Alloy SA-112 contains 12% silver. Melting loss is 00.000mg with Swiss Alloy. 75% gold jewellery colour will be colour of 85%gold jewellery. It is easy to make hollow balls and beads with Swiss Alloy. Avoid oxidation while making jewellery with the antitarnish property.
https://www.gold.info/en/gold-alloys/
Whereas harder 585 gold alloys exhibit a rather pale colour, softer alloys with a gold weight proportion of at least a 75% have an intensive lustre. In the first instance a goldsmith selects an alloy according to the technology he wants to use when forming the gold and ultimately what the finished jewellery …
https://www.ganoksin.com/article/different-coloured-gold-alloys/
In Europe, a new trend towards more white gold jewellery has recently become apparent. The white gold alloys used in the jewellery industry are based primarily on Au-Cu-Ni-Zn, and Au-Pd-Ag combinations. The bleaching effect of nickel or palladium is a result of lowering the reflectivity of the alloy for the low energy part of the visible spectrum.
https://www.assayofficelondon.co.uk/media/2560/jewellery-alloys-past-present-future-c-corti.pdf
gold, as silver imparts a greenish hue and large amounts produce white gold alloys. Many ancient artefacts in gold are made from naturally -occurring electrum. The Wild Ass of Ur is made by lost wax casting in electrum and dates from 1260 BC2. Incidentally, lost wax casting as a manufacturing technology is some 6,000 years old.
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https://link.springer.com/article/10.1007/BF03215089
The classification of gold alloys in terms of caratage and colour provides no guidance as to the properties and working characteristics of the many carat gold alloys used in jewellery fabrication. Logical relationships do exist, however, between the composition, metallurgical structure and properties of such alloys, and these emerge from a study of the phase diagrams of the alloy systems involved.
https://link.springer.com/article/10.1007/BF03214796
From ancient times, gold has been used mostly in decorative items, and the colour of gold plays an important role in this application field. Different methods have been developed to objectively characterize the colour. This paper describes the CIELAB system, which has gained acceptance as an effective way to assess colour. The different coloured gold alloys known today are also described, with ...Cited by: 168
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