Unbiased. Nonprofit. No ads or money from businesses we rate.
Find, rate, and compare home-improvement contractors, health-care providers, repair shops, financial services, veterinarians, stores, dentists, and more than 100 other types of service providers.
Boston area
Chicago area
Delaware Valley area
Puget Sound area
San Francisco Bay Area
Twin Cities area
Washington, DC area
We have watch repair shop ratings for these seven metro areas.
Ratings of Primary Care Doctors, Specialists, and Surgeons
Ratings of Hospitals
The Four Cs Classifications for Diamonds
The four Cs—cut, carat, color, and clarity—help determine a stone’s price. Pay attention to these guidelines, but don’t assume better grades are always worth higher price tags. You can spend a lot more money for a higher-grade stone when a lower-grade one will do.
Beyond the Four Cs: Other Factors to Consider When Buying a Diamond
When shopping for diamonds, in addition to seeing how costs are affected by cut, carat, color, and clarity, consider these other factors.
Why You Should Buy Lab-Grown Diamonds Instead of Mined Stones
Lab-grown diamonds, which are surging in popularity, are identical to mined stones but more ethical and far more affordable. Manufactured diamonds are actual diamond material (crystallized carbon); even gemologists can’t distinguish between the two without laboratory testing.
