Another one.
Most ponies, when they see her for the first time, notice several interesting features:
First of all, they notice that she is tall, much taller than most other ponies. Then they see the thick fur of her dark red coat indicating that she came from northern, colder regions of Equestria. The next thing they notice are unusual lighter spots on her upper legs and chest area. Then they see the mane and the tail - almost golden and well kept but still rather short and practical. These features, all combined give the impression that Stonebound may belong to some kind of royal family.
The next thing they see are her blue eyes, big and always sad, complemented with almost always worried expression on her face. Then they notice the exposed hooves, rare thing among the mares, typical for the hard workers. In the end there is a cutie mark, completely generic pickaxe.
Only few ponies noticed the unique piece of jewelry, a small amulet on her neck.

Indeed, stonebound is rather strange mare. She indeed came from the cold north to escape the rough climates of her hometown. She was born in the middle class, her father is a miner and mother is a mediocre jeweler. When Stonebound was born, they wanted to keep her safe, away from dangerous mines her hometown was famous of, they tried to raise her as a lady but the fate wanted different and the young filly accidentally discovered her talent in mining. Her parents were not pleased and eventually accepted it.
When Stonebound left her home she was already quite strange, hard working mare with ton of lady-like habits. It took her a while but she eventually found a new home around the gemstone mine and became on of the local workers and quickly advanced to the rank of supervisor of the third shaft.
Stonebound is kind-hearted but rather paranoid, she really cares about other workers always expecting the worst and always trying to keep everypony around her as safe as possible. She is rough and strict when it comes to work, believing that only iron discipline can ensure safety. She became even more paranoid when she nearly lost two careless workers when part of her shaft collapsed.
In private however, she is still very kind and lady-like, though very serious. She never really had much time for fun, all she got to know as little filly were good manners and hard work anyway.

As stated before: Dark red coat with lighter spots on upper legs and lower chest/belly area, yellow, almost golden mane, blue eyes. Note the exposed hooves and rather big nose. Her cutie mark is a pickaxe.