This Valentine's Day, many couples are planning engagements and consumers are buying diamond jewelry -- more so than at any other time of the year. But consumers are concerned that they are getting the best diamond in terms of quality when they commit to their partner. Sarnen, Switzerland-based online diamond advisory website The Diamond Pro surveyed a representative of 1,000 US adults to find out what concerned them about buying diamonds. The survey shows that overpaying, being taken advantage of and not getting a high-quality diamond are top concerns consumers face when shopping for a diamond. Consumers in general do not feel confident with key aspects of the diamond buying process.