Amber is an ancient jewelry material. As a gem, it has a history of nearly 6000 years. Decorations made of amber have been unearthed in many ancient tombs in China, Greece and Egypt. Women in ancient Rome had the habit of holding precious stones in their hands. The reason is that amber will give off a faint fragrance when heated at the temperature of the palm. The ancient Romans gave amber a very high value, and a small statue carved with amber was more valuable than a strong slave. Amber can also relieve pain and relieve shock. In some places, a string of amber is often hung on children's chests to ward off evil spirits and relieve shock.