White gold is genuine gold. However, as previously stated, when selecting a metal type, you must consider the number of karats to determine how pure it is. For engagement rings, 14k or 18k gold are the most common choices. These options are far more durable than pure 24k ring, with 14k gold being the tougher of the two (the less pure gold present, the better the durability).
How is white gold produced? White gold, on the other hand, is a combination, or alloy, of gold and white metal, most commonly nickel, silver, or palladium. Although the metal mixture and the type of metal used account for a large portion of the color variation, white gold is usually plated with rhodium — a silver/white metal that adds a shiny color and a bit more durability to white gold rings.