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As implied by the name, diamond-like carbon (DLC), the value of such coatings accrues from their ability to provide some of the properties of diamond to surfaces of almost any material. The primary desirable qualities are hardness, wear resistance, and slickness (DLC film friction coefficient against polished steel ranges from 0.05 to 0.20 [10]).
Buy stainless steel or platinum jewelry, or jewelry made from precious metals like sterling silver or solid gold. Quince Bold 14k Gold Hoops Mejuri Wishbone Stacker Set
Various colors on stainless steel 18 Cr / 8 Ni 7.5 g of sodium dichromate , 1000 mL of sulfuric acid (1.24 g/cm 3 ), lead cathodes, object as an anode, 70-90 °C temp, 0,06 A/dm 2 , voltage 1.3 V – colors depend on the duration of the procedure (5-50 min.), brown, blue, reddish brown, yellow, green.
Bracelet in platinum, white gold, silver, diamonds, lapislazuli, turquoise, by Cartier Paris, 1937. Growing political tensions, the after-effects of the war, and a reaction against the perceived decadence of the turn of the 20th century led to simpler forms, combined with more effective manufacturing for mass production of high-quality jewellery.
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Bars would have been made from stainless steel, sterling silver or 18k gold. Cartier recently re-introduced these interchangeable cufflinks [6] with batons made from striped chalcedony, silver obsidian, malachite, sodalite, and red tiger's eye. The accompanying bars are made from 18k gold or palladium plated sterling silver.
Black gold is a type of gold used in jewelry. [16] [17] Black-colored gold can be produced by various methods: Patination by applying sulfur- and oxygen-containing compounds. Plasma-assisted chemical vapor deposition process involving amorphous carbon; Controlled oxidation of gold containing chromium or cobalt (e.g. 75% gold, 25% cobalt [4]).
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