In recent times white gold has become popular precious metal for engagement or wedding rings. However it has been competing with platinum because they actually look the same. If you have to sell gold jewellery Melbourne and you happen to have a ring that you think might be white gold, it will do you good to understand whether it really is white gold or platinum. Let’s look at the similarities these two metals share:
For starters these two are both dense, ductile but malleable enough to be used in jewellery and other industrial applications. Traditionally, gold has been a symbol of wealth but platinum has been more valuable than gold.
Gold is typically yellow and only comes in different colours depending on the alloys used. White gold gets its silvery/white colour from being alloyed with metals like silver, manganese, nickel and even platinum itself. Gold is resistant to corrosion, is an excellent conductor of electricity and heat. To get the shiny finish in jeweller, a rhodium plating is usually applied. It needs to be reapplied periodically to prevent the gold from turning yellow again.
Platinum is used to make jewellery but it is more greyish than white gold. Platinum is mode dense than gold so a 95% pure platinum ring will weigh less than a similar sized ring. This means a platinum ring will be heavier than gold. This could make the ring uncomfortable to wear for long periods of time.
Platinum is hypoallergenic which makes it a better choice for people with nickel usually used as an alloy to give yellow gold its white hue. Platinum is more expensive than gold but there is a cheaper option with similar characteristics known as Palladium. These two metals are part of a number of metals classified as PGMS or Platinum Group Metals. Platinum may be a great choice for a unique wedding ring but most PGMS are produced for use in industrial applications such as catalytically converters used in the automotive industry. Palladium is used in certain chemical refining applications, plastics, coatings, textiles and medical applications.
While the price of gold will continue to go up and down, the price of platinum is expected to keep rising steadily because the supply of platinum is limited and has been dwindling over the past couple of decades.
Platinum might be stronger and denser but it is softer that 14k white gold. This means that it scratches easily. However, when platinum is scratched it simply gets moved from one place to another and creates a special ‘patina’ finish. Which some people find appealing. You can restore the ring to its original state by re-polishing.
Failing to be able to distinguish between platinum and white gold can be a costly mistake when you sell gold jewellery Melbourne. To ensure that you have gold or platinum jewellery, you need to get it tested and an acid test might not be good enough. This is why precious metal dealers use XRF technology (X-ray fluorescence) for fast and accurate analysis of the metals.