|MANUFACTURER SINCE 1920|
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Gold was one of the first known metals. Its beauty, versatile and useful physical characteristics, and scarcity help continue to make it a very valuable commodity.
Gold won't tarnish, rust, or corrode, and though it's very strong, is the most malleable and ductile of all metals. One single gram of pure gold can be made as thin as a 1 square meter sheet. However, pure gold is too soft and it is usually alloyed with base metals for use in jewelry, altering its hardness and ductility, melting point, color and other properties.
Karatage indicates purity and is noted by a number followed by the letter "k". Traditionally karatage is expressed in 24ths, meaning 18k gold is an alloy of 18 parts gold and six parts other metal. 24k gold is 100% gold with no alloyed metals. Mazal Diamond offers only 18k gold in all of our gold jewelery. Alloys with lower karatage, typically 22k, 18k, 14k or 10k, contain higher percentages of copper, or other base metals or silver or palladium in the alloy. White gold alloys can be made with palladium or nickel. White 18 carat gold containing 17.3% nickel, 5.5% zinc and 2.2% copper is silver in appearance. Nickel can be toxic, however, and it is carefully monitored by legislation in Europe.
There are three compulsory hallmarks applied to precious metals as a quality control: a sponsor's (maker's) mark, a fineness mark, and an assay office mark. These marks establish the origin and fineness of the precious metal and ensures it has been accurately and independently tested.
There are few exemptions to the hallmarking laws. One exemption is by weight; compulsory hallmarks are not needed on gold under 1g, silver under 7.78g and platinum under 0.5g. Also, the UK is required by the European Court of Justice to accept other European national hallmarks as sufficient hallmarking, providing those hallmarks represent an equivalent guarantee of quality.
All products sold by Mazal Diamond comply with current European Parliamentary nickel regulations. At Mazal Diamond both Yellow and White 18kt Gold are 750/1000 gold to ensure its sufficient hardness to stand the test of daily use, and maintain the bright durable color that distinguishes gold from any other metal. It must be said that to enhance the whiteness, almost all white gold is plated with rhodium, an extremely hard and shiny white metal in the platinum group.
Depending on the amount of wear to a piece of jewelry, over time this rhodium plating may wear off, revealing the original metal color. If needed, re-plating is a simple process that can be done to restore your jewelry's whiteness.