Who competes with Blue Nile?

Who exactly are the competitors of Blue Nile in the diamond and jewelry industry? Are there any major players that offer a similar online shopping experience with a focus on certified diamonds and engagement rings? Are there any brands that offer a wider range of products or services that may pose a threat to Blue Nile's market share? Additionally, are there any up-and-coming brands or startups that are gaining traction and could potentially challenge Blue Nile's position in the future? Understanding the competitive landscape is crucial for any business, so it's important to stay informed about who the key players are and how they compare to Blue Nile.