For those born in the month of March, the official gemstone is the Aquamarine. It can range in color from a very pale shade, almost colorless, which is also the most valuable, to a most sought-after deep-blue aqua.
The 10 Biggest Dog Breeds. 1  Tibetan Mastiff: This handsome dog is known for the lionlike mane around his head. He was bred to guard temples. The biggest Tibetan Mastiff is said to have been around 280 pounds, but these days they average 180 pounds.
But the large-sized Labrador Retriever is still the number one breed in the U.S. Fashionable dog breeds will come and go, but the biggest dog breeds seem to have staying power (consider the Mastiff). And, though itâs hard to believe, these gigantic breeds are really as big as a horse â OK, maybe a miniature horse.