However, in 2005, it was reported that miners in Madagascar dug up a gem weighing 1,182 pounds which has also been feted as the world's largest emerald. Of less contention is the largest known pearl which was found by a Filipino diver off the island of Palawan in 1934.
USDA Beef Grades. Beef is graded for quality by U.S. Department of Agriculture (USDA) graders according to standards established by the USDA. Grades are based on the amount of marbling (flecks in fat within the lean) and the age of the animal.
USDA Prime The USDAâs top level, awarded to beef with the most marbling. About 2 percent of beef is graded prime; most goes to restaurants. Choice is the next best level. Japanese Grade 12 Japan grades its beef on a scale of 1 to 12; the most densely marbled meat receives a 12.