The technical difference
Now we know the technical differences between platinum and 18 karat white gold, let’s consider the aesthetics of each. At first, they may appear identical, however, there are very subtle differences that might make two rings look different even if it’s very difficult to see. As white gold is mixed with other alloys for strength and is less dense, it can be crafted into very, very fine details making the finished piece lighter and more delicate in appearance. The rhodium plating also helps to keep its crisp white, shiny finish. For platinum, it is naturally white in colour, though it has a slight blue/grey undertone; this can make jewellery look heavier even though it is exquisitely finished.
In practical terms for durability, it depends on how often and how hard a piece of jewellery is worn. For items such as earrings, necklaces and bracelets this is less of a factor than for rings. Although rhodium plating does improve the durability and brightness of white gold, it does wear off over time. This can be done anytime between once a year to once every two or three years, it is a simple and cost-effective procedure where the ring is sent to the workshop to be re-plated and your ring returns looking fresh and new. As platinum is more durable, it requires less repolishing however it can dull over time and so surface polishing is also required to maintain your jewellery.