Jewel flinches a little more and sulks a bit as Brash starts to chastise her, just like she thought that she would. It probably would have been better if she didn't say anything, as usual, and now she had no doubt tarnished what little trust Brash had in Jewel to begin with. She was about to make ready to wordlessly go out into the streets to conduct the shady business that Brash wanted her to do, but was stopped when Brash upended a bag of blue gems, each one of different shape and cut, and asking her to sort the benitoite from the rest, or find someone else who could do it.
Here was something she could do, but again, the fear of failure came to her mind. What if she got one wrong? She would prove herself to be utterly worthless to Brash and no doubt be kicked back ono the street. Still though, it was better than knocking on each and every house in Ponyville and figuring out which ones had ponies that weren't home at this time of day, so hesitantly, she sat down in front of the gems, looking over each one individually as she tried to remember what benitoite was. It was blue, that was for certain, but then again, so were many of these gems, and benitoite was even sometimes, on rare occasions, white, so colour was out the window. Benitoite was supposed to leave a white streak when scratched, was vitreous and glassy like... well, glass, but there was one crucial detail that really set it apart...
"Umm, I'm sorry Brash, but..." she gulped as she asked, "do you have an ultraviolet light? One very unique thing that benitoite does is glow bright blue and bluish white under that kind of light, and it would make seperating and ordering these crystals much easier and faster without having to scratch all of them to compare hardness and streaks."