Question: what kt gold is the best?
Answer: 24K (100% pure gold) Being the highest karat of gold, it's easy to assume that 24K is the “best” gold to buy, but that isn't necessarily the case. ... 
22K (92% gold and 8% alloyed metals) ... 
18K (75% gold and 25% alloyed metals) ... 
14K (58% gold and 42% alloyed metals)