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If the gold layer is 12 kt or higher, the minimum layer of karat gold in an item stamped gold-filled marks must equal at least 1 ⁄ 20th the total weight of the item. The most common stamps found on gold-filled jewelry are 1 ⁄ 20th 12kt GF and 1 ⁄ 20th 14kt GF. Also common is 1 ⁄ 10th 10kt. These standards are for modern gold-filled items.
Gold often occurs in free elemental ( native state ), as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver (as in electrum ), naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite.
Colored gold is the name given to any gold that has been treated using techniques to change its natural color. Pure gold is slightly reddish yellow in color, [ 1] but colored gold can come in a variety of different colors by alloying it with different elements. Colored golds can be classified in three groups: [ 2]
14K gold barbells in front of 24K gold for color comparison. Gold is a noble metal with a long tradition for use in jewelry. When using gold for piercings, a lower purity than 14 or 18 carat (58 to 75%) is not recommended. Gold is about as soft as lead and is easily scratched. These scratches can irritate the body, especially in new piercings.
Whether you prefer solid gold like the Zenyu Ovate hoop ($115; $81) or stacking pieces like the Double Chain necklace ($167), this London-based company has you covered. 5. Brinker & Eliza
Millefiori beads from Murano. Murano beads are intricate glass beads influenced by Venetian glass artists. Since 1291, Murano glassmakers have refined technologies for producing beads and glasswork such as crystalline glass, enamelled glass (smalto), glass with threads of gold (), multicolored glass (millefiori), milk glass (lattimo) and imitation gemstones made of glass.
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