You’ve probably perused online or at a store, and seen several versions of a gua sha stone — all different shapes, sizes, and colors. Chances are that you’ve probably wondered, “What is this weird little thing?” Skincare novices everywhere have heard that using a gua sha with serums and face oils is good for them.

The gua sha stone is a tool with origins tracing back to East Asian and Chinese medicine. Gua means “scrape” and sha means “sand,” according to Good Housekeeping. According to a board-certified dermatologist, this small tool promotes tissue drainage and muscle relaxation in the area it’s applied to.

Gua sha stones typically come in two main materials: jade and rose quartz. According to Fashion Magazine, the stones’ color is believed to correspond to different healing benefits depending on the body area being massaged. So now that you know what it is, let’s talk about what each stone does.

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Face Gua Sha Stone

This shape is probably the most common one you have seen in stores and on Amazon. This stone is a great “starter” stone if you’re looking to dip your feet into gua shas as a skincare tool. What is it good for? This tool massages, contours, helps minimize lines, and reduces puffiness on the face.

Eye Gua Sha Stones

The skin under your eye is sensitive making the eye stone your best friend. What do they help with? They can assist in minimizing the puffiness under the eyes, brightening and soothing the skin, and contouring the cheekbone.

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Body Gua Sha Stone

The body stone is perhaps the least funky of the shapes, and is perfect for overall body use. You can use it to help soothe your muscles and apply light pressure to tense areas.

However, despite the their distinct shapes, using them isn’t difficult. Check out the video below to see how to use the stone.