18Kt gold means that in 24g of alloy, there is 18g, or 75.01%, “pure gold”. It is also called 750/1000 gold. It is the most precious because it contains the most pure gold.
Yellow Gold
Yellow gold is a warm color that embodies classical jewelry. It embodies the preciousness of this rare metal. It is the only yellow metal that does not oxidize and will forever stay the same color. 18-carat yellow gold is composed of 75% pure gold, 12.5% silver and 12.5% copper, in order to obtain the best compromise between color and mechanical properties. The 9-carat is composed of 37.5% fine gold, 12.1% silver, 44.4% copper and zinc.
White Gold
A frigid color, white gold, or grey, is more modern. It magnifies the pave diamonds and enhances the solitaires with an elegant tone. White gold is much more resistant and does not oxidize unlike silver. Nonetheless, it is possible that white gold will turn slightly yellow through normal wear, which is completely normal. A simple coat of white rhodium every 3 to 5 years is sufficient to give back its original luster. 18-carat white gold is composed of 75% gold, 24% silver and copper. Its 9-carat equivalent is composed of 37.5% fine gold and 62.5% silver. A layer of white rhodium to give a pure white color covers them both.
Pink Gold
Rose gold with fair-skinned carnation-like color is very soft, less frigid than white gold and more modern than yellow gold. On dark skin, it stands out magnificently with a touch of originality. 18-carat rose gold is composed of 75% gold, 5% silver and 20% copper which gives it its color. 9-carat rose gold is composed of 37.5% fine gold, 42.5% copper and 20% silver.
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