My dear friend got me started on gua sha and since we had to use an oil, because I have adult acne, we decided to go with this one. She uses the Emerald, her mother the Orchid, neither of which was going to work for me. So I have been using the oil for 2 months and my face stopped breaking out except for once. That's amazing and the singular zit was teeny. I'm so happy. I was so afraid to put oil on my skin that I've always lamented was oily in some places and dry in others but this one works. My skin soaks it in and I love it. Just bought my second bottle and yes, it's expensive, but the results are clear.