To perform a competitive analysis of the jewelry landscape for Tiffany's, Harry Winston, Cartier, Moussaieff, DeBeers, Graff and Blue Nile. For each company obtain their revenue and form of profitability (net income or EBITDA) from 2017-2020, number of retail stores in the US and internationally, estimated size of inventory for 2017-2020 depending on business model, and percent of market share. Also, to include a profile of the companies that includes an overview of key features like the divisions, business model, and concentration of business (market concentration) in a Google doc.