Trying to find the right crystal to use..

Hi :) Pretty new-ish to healing stones and the like, I've fallen in love! I've already acquired a good size collection. I'm a dog groomer, and am wondering if anybody can advise me on what a good crystal would be to carry on me while I'm working, one that could help me to connect with & give off a comforting and gentle vibe to the dogs I groom. I realize that it must be a little scary, at least for the dogs who are not in the salon every 6 wks religiously, as somebody you cannot speak to through words is coming at you with sharp tools, putting them near face, eyes, bum, etc! I want them to feel at ease, which I totally understand has a lot to do also, with my body language and how I carry myself. I feel I'm pretty good with that, just want something to help me out, a little something extra to make the experience that much easier for them.

Any suggestions?

Thanks!