You want a silver-colored engagement ring. You have two premium choices: PT950 Platinum or 18K White Gold. They look identical in the jeweler's display case. Which one should you choose?
1. The Cost Difference (Density)
If you look at the spot price of gold and platinum, they are often similar. But a platinum ring will cost significantly more than the exact same ring in white gold. Why? Density.
Platinum is incredibly dense. If you have a mold for a ring and fill it with 18K white gold, it might weigh 5 grams. If you fill that exact same mold with platinum, the ring will weigh almost 8 grams. You are buying 60% more metal by weight just to get the same physical size.
2. The Maintenance Nightmare of White Gold
Here is the dirty secret of 18K white gold: It is not actually white.
Gold is naturally yellow. To make it white, jewelers mix it with nickel or palladium, turning it into a pale, yellowish-gray color. To make it bright white, they electroplate the ring with Rhodium (a rare metal).
Within 6 to 12 months of daily wear, the rhodium plating rubs off, and your beautiful white ring starts looking yellow. You must pay a jeweler ₹1,500 to ₹3,000 to re-plate it every year.
Platinum is naturally white. It will never turn yellow, and it never needs to be rhodium plated.
3. Diamond Security
Because platinum does not break or wear away easily, it is vastly superior for holding expensive diamonds. If you hit an 18K gold prong hard against a table, it might snap off, dropping your diamond. A platinum prong will bend, but it will almost never break.
The Verdict
- Buy 18K White Gold if: You are on a strict budget today, want intricate filigree designs, and don't mind paying for annual maintenance.
- Buy PT950 Platinum if: You want a heavy, ultra-durable ring, have a large center diamond to protect, and hate the idea of going to the jeweler every year for rhodium plating.