What is L mean on gold?

The "L" in the context of gold typically refers to the purity of the gold, specifically indicating "carat" (often abbreviated as "K" for karat). For example, 24K gold is considered pure gold, while 18K gold contains 75% gold and 25% other metals. In some contexts, "L" may also refer to "London," as in the London Bullion Market, which is a major trading hub for gold and other precious metals.