Platinum and 18k gold have different materials, prices, hardness, and colors.
1. Different materials
18K gold is an alloy made by melting gold and other metals, with a gold content of less than 90%.
Platinum is a naturally occurring white precious metal that is rare in production and extremely precious.
2. Different prices
18K gold is an alloy made by melting gold and other metals, so its price is relatively cheaper.
Platinum is 30 times rarer than gold and can only be mined in very few places around the world. The saying goes that rarity is precious, so the price of platinum will be relatively expensive.
3. 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.
4. Different colors
The natural color of 18k gold should be golden in color, but with the addition of other metals, there will be white 18k gold, yellow 18k gold, rose 18k gold, black 18k gold, etc.
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.