Question: is 23 carat gold pure?
Answer: It means, 91.6 pure gold in 100 gram alloy (a combination of metals). Likewise, 23 carat gold is referred to as 958 gold which means 95.8 grams of pure gold in 100 gram alloy. 18 carat or 750 gold means 75 grams of pure gold in 100 gram alloy.