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.
Though the Great Dane is typically considered the largest of all dog breeds, we're going to look at a few other breeds that give this one a run for its money, including one breed that is actually even taller.For a better understanding of their height, this Great Dane poses with a small dog standing under her.Photo:Stanimir G.Stoev/Shutterstock). Mastiff breeds are certainly among the largest dogs in terms of sheer mass. The Neapolitan mastiff originated in southern Italy. Used as a guard dog, the average male mastiff stands between 26-31 inches tall and weighs a hefty 130-155 pounds.