Gold is available in various karats which indicate purity; 24k being pure gold but too soft for daily wear, 18k is 75% pure and more durable, while 14k is 58.3% gold content making it even stronger. Additionally, gold comes in different colors such as yellow (classic warm hue), white (mixed with metals like nickel or palladium for a silvery appearance), and rose gold (alloyed with copper to give it a pinkish tone).