Finally, while this story focuses on yellow gold, we have a quick note on white gold and rose gold and what they are. White gold is gold that's mixed with palladium, nickel, or manganese to achieve the look of platinum, which is an extremely strong metal that's even more expensive than gold. The "silver"-like metal is a popular choice when it comes to wedding bands since platinum is known for its durability and luxury. Rose gold is when copper is mixed in with gold to beget that pinkish, warm hue. Now, take your lessons in gold and put them to the shopping test.