GOLD
금 has been used for coins, jewellery and decoration 수천년 동안. Gold is prized for its 희박, 아름다움, 내구성 그리고 unique qualities that enable the jeweller to craft it into almost any form desired. 색상을 다양하게 하고 경도를 높이기 위해, 금은 거의 항상 다른 금속과 합금됩니다. The purity of gold jewellery is expressed in karats, which is a measure of gold content or percentage. Gold jewellery is “hallmarked” to indicate the content of gold, 즉: 10케이, 14케이, 18케이, 19, or 24k, 24케이 존재 순수 금.
PLATINUM
Of all the precious metals, 백금 은 most rare and the most valuable. Denser than gold, it is inert and thus very resistant to corrosion. 백금 ~이다 very strong, yet is soft and easy to carve. Platinum settings for gemstones last for years and years. Most platinum jewellery is alloyed with 5% 다른 금속의, giving it a standard hallmark of 950.
SILVER
순수한은 has an exceptionally 밝은, silver-white colour that readily tarnishes upon exposure to air. Too soft to be used in jewellery in its pure form, silver is alloyed, usually to 7.5% with other metals , giving it the characteristic hallmark of 925, 또는 “sterling” 은. Less rare than gold or platinum, 은 is an affordable and beautiful choice for jewellery. Most fine silver jewellery is plated with rhodium, a bright white metal, in order to make the silver jewellery more tarnish resistant.
RHODIUM AND PALLADIUM
Hard white metals from the platinum group of the elements, rhodium and palladium are used in jewellery making to make white gold whiter and to plate silver and white gold jewellery.