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UnoAErre Italia is a goldsmith, jewelry and watchmaking company based in Arezzo, [ 1 ] [ 2 ] The company manufactures, distributes and exports of gold and jewelry in Italy and abroad. History
24-carat gold is pure (while 100% purity is very difficult to attain, 24-carat as a designation is permitted in commerce for a minimum of 99.95% purity), 18-carat gold is 18 parts gold, 6 parts another metal (forming an alloy with 75% gold), 12-carat gold is 12 parts gold (12 parts another metal), and so forth.
There are three basic techniques that may be used to attach granules to a metal surface: hard soldering, fusing and colloidal soldering. The metals used in granulation are usually gold and/or silver alloys of high purity – alloys below 18 kt. gold and sterling silver being unsuitable. With each technique, the process begins with the making of ...
A hallmark is punched into a section of a silver chain by a silversmith.. A hallmark is an official mark or series of marks struck on items made of metal, mostly to certify the content of noble metals—such as platinum, gold, silver and in some nations, palladium.
Gold-filled material is used to create a variety of products, including: Jewelry: Gold-filled is a popular choice for jewelry because it's durable, affordable, and hypoallergenic. Findings and components: Gold-filled is also used to make jewelry findings (e.g., clasps, jump rings) and other components.
French silver made for export carries an assay mark in the shape of the head of Mercury, along with a number to indicate the millesimal fineness: "1" for .920, "2" for .840 and "3" for .750. French silver also is punched with the mark of the maker, by law in the shape of a lozenge, usually with the maker's initials and a symbol.
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The back of an Italian florin coin Florin from the Środa treasure. The Florentine florin was a gold coin (in Italian Fiorino d'oro) struck from 1252 to 1533 with no significant change in its design or metal content standard during that time.