Fireglass is a kind of literary old wood. Its raw material is the aged material of Rhamnus macrophylla. Rhamnus macrophylla is a small tree or shrub with a height of about 10 m. Although the tree species of fire glass is Rhamnus macrophylla, it can only become fire glass if it grows in a barren environment and needs thousands of years of aging. Therefore, fire glass can be said to be the best of Rhamnus macrophylla. Fire glass is very popular in the literary world because of its high ornamental value and collection value. Fire glass is bright in color, unique in texture and grain, and looks very beautiful. At the same time, due to the high density of fire glass, it feels very calm, and it can play a role in ward off evil spirits in the town house when placed indoors. Therefore, the fire glass also has a certain mysterious color and is known as the "old Shenmu".