18k platinum and platinum have different materials, colors, prices, and hardness.
1. Different materials
According to the national precious metal jewelry standards, only platinum can be called platinum. What is commonly referred to as platinum in the market should strictly be called 18K white K gold or 18K white gold, which is an alloy made by melting gold and other metals.
Platinum is a naturally occurring white precious metal that is rare in production and extremely precious.
2. Different colors
The natural color of 18k platinum should be golden, but with the addition of other metals, there will be white, yellow, and rose gold 18k gold.
The luster of platinum is naturally pure and will not change color or fade due to daily wear. It can maintain its natural pure white luster no matter how long it is worn.
3. Different prices
18K white gold is an alloy made by melting gold and other metals, so its price is slightly cheaper.
Platinum is 30 times rarer than gold and can only be mined in very few places around the world. As the saying goes, rarity is precious, and platinum's price will be relatively expensive.
4. Different hardness
18K gold is made by adding other metals to gold, so its hardness is relatively higher.
Platinum has good toughness and ductility, but its hardness is relatively low and it is prone to deformation. Improper matching can cause diamonds to fall off.