We do not make a range of Preseli Bluestone skincare. It was something we looked into some years back but decided against it as it was very complex. For skincare I personally use a lot of the eco lines at LoveLula. These are well established skincare ranges that have been tried and tested (no animal testing allowed on any of these though).
Stress is a major factor in preventing skin issues. You can use your Preseli Bluestones to meditate with to counter distress and find inner peace and calm. Also of course plenty of hydration and good whole foods are also beneficial for our gut and skin health.