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.
Last but not the least onto my list of biggest dog breeds in the world is none other than a Tibetian Mastiff. They grow to a height of 24 to 26 inches, weighing about 85 to 140 pounds. They usually have a life span of about 10 to 14 years. Tibetan Mastiffs are highly intelligent and independent thinkers.