- Different Gold Colors
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- Yellow Gold
Yellow gold actually comes in a range of hues depending on the proportions of different metals in the alloy, A lighter or slightly green hue suggests higher silver content while a darker or reddish tint usually means higher copper content.
Zinc and nickel are also sometimes used in yellow gold jewellery, When mixed with copper, These white metals form warm, Brassy tones that soften the stark yellowness of pure gold.
Note that the non-gold metal percentages shown above are approximations not requirements, Jewellery manufacturers must meet the minimum gold content for each of the types of gold karatages, But will often vary the types and amounts of the non-gold metals they use.
White gold is an alloy of yellow gold and white metals and sometimes also copper, The less gold and copper used in the metal alloy, The more white it appears, White gold jewellery is usually plated with rhodium, Which makes it even whiter.
White gold is usually formed from one of two different alloys :
- White Gold
White gold is an alloy of yellow gold and white metals and sometimes also copper, The less gold and copper used in the metal alloy, The more white it appears, White gold jewellery is usually plated with rhodium, Which makes it even whiter.
White gold is usually formed from one of two different alloys :
- Palladium white gold, A mixture of gold, palladium and sometimes silver, Palladium is a hypoallergenic precious metal with higher value than gold.
- Nickel white gold, Consisting of gold, Nickel, Copper and zincm While not hypoallergenic, This form of gold is more affordable compared to palladium white gold.
- Rose Gold
Rose gold is made from gold, Copper and silver, Copper is what gives rose gold its pinkish colour, Most rose gold alloys are either 18k or 14k of the two, 18k rose gold contains more gold making for a shinier but paler blush-pink appearance, 14k rose gold contains more copper which results in a deeper complexion but less brightness.
With some adjustments in composition, A rose gold piece can take on slightly different hues :
- Pink gold alloys use higher silver and lower copper to give the metal a more soft rose colour.
- Red gold uses copper but no silver to get a darker red quality from the jewellery metal.
- Black Gold
Since there are no black gold metal alloys, Solid black gold jewellery doesn’t exist. Instead, jewellers give a piece of gold jewellery a black surface coating.
Different ways to form black gold include :
- Electroplating – A layer of black rhodium or ruthenium is electrically bonded to gold.
- Chemical vapor deposition ( CVD ) – Carbon vapor is deposited onto gold as a black coating.
- Oxidation – Gold alloyed with cobalt or chromium is heated to oxidize and blacken it.
- Patination – Gold is chemically processed with sulfides to produce a black patina.
- Laser treatment – Femtosecond lasering creates nanostructures on gold that absorb nearly all visible light.
- Green Gold
Since green isn’t a popular type of gold, Green gold items are rare, You’re more likely to see green gold pieces at an independent jewellery shop than in a chain store.
- Purple Gold
Biz Sky Financial Group is one of the few jewellers that produce purple gold, Purple gold isn’t malleable enough to form functional jewellery components like ring bands and necklace chains.
- Blue Gold
Intermetallic blue gold is made from gold mixed with indium or gallium but neither formulation yields a strong blue colour.
Oxidized blue gold is created by subjecting certain types of gold alloys to heat, The richest known blue gold colour was produced in the 1980s by a now-defunct European company from a gold alloy that included ruthenium and rhodium.