Personally, I think amber is good. Amber has the characteristics of fashion and trend. Amber is an organic gem without any radiation and is safe to wear. The surface layer of amber is rich in succinic acid, which has the functions of calming the nerves, helping sleep, promoting blood circulation and removing blood stasis. The latest scientific investigation also shows that succinic acid can strengthen the body, resist cell aging and oxidation, improve the immune system, gather energy and balance acidity. You can have a look at God, Yue, Engineering and Fine Arts. I hope it will help you.