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8 December 2020, 12:41 PM | #1 |
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Omega's white gold
I'm wondering what Omega white gold is called? Also are they like the rolex gray gold? Or are they coated white over the yellow gold?
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8 December 2020, 06:56 PM | #2 |
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It's rightfully called "white gold", usually "Au750" which is 18K, as indicated on the inside of a lug.
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9 December 2020, 02:31 AM | #3 | |
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9 December 2020, 02:59 AM | #4 |
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It is not just Rolex that does that. Coloured gold used in jewelry (whether yellow, white or rose) are alloys by definition, e.g. Au750 white gold is 75% pure gold whilst the remaining 25% could be palladium/silver/nickel to make it "white". It could be that Rolex and Omega use different alloys to achieve different hues, but technically speaking it is still 18K gold.
Solid/Plated gold is a different topic. |
9 December 2020, 09:44 AM | #5 |
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I think the OP's question is a bit more subtle than gold plated vs. solid gold. Historically white gold alloys often contained a fair amount of silver for the 25% non.gold and had a slightly yellow tint which became more predominant over time. Solution was (and still is for a lot of WG jewellery) to rhodium plate the white gold to give it a silvery shimmer free of any yellow tint. Problem is the plating will wear off over time and will need to be renewed every 5 to 10 years.
These days most watch manufactures including e.g. Rolex and Patek use "grey gold" which is a 18k white gold alloy that typically contain a large amount of palladium for the remaining 25%. This yields a greyish white gold which is fairly dense and more durable than YG, and which will not yellow over time. I do not know about Omega WG, but I would expect they also use a grey gold alloy these days. |
9 December 2020, 11:16 AM | #6 | |
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