What percentage does Blue Nile mark up diamonds by?

Could you please clarify the question regarding the percentage that Blue Nile marks up diamonds by? Are you asking about the average markup percentage across all diamond offerings, or is there a specific diamond or diamond category you're interested in? It's important to note that markup percentages can vary depending on various factors such as the diamond's rarity, quality, and market demand. Additionally, it's essential to understand that Blue Nile, like any other jewelry retailer, needs to account for operational costs, overhead expenses, and profit margins when setting prices.