What does amber primary leakage mean?

It shows that there are some impurities in amber.

Natural amber is distinguished by color and transparency, which can be basically divided into four grades: super grade: red or golden yellow, containing complete animal and plant fossils, free from cracks and other impurities, and transparent.

Grade I: yellow or honey yellow, containing a small amount of incomplete or common animal and plant fossils, with no cracks or a small amount of cracks, transparent.

Grade II: yellow, containing a small amount of animal and plant fossils, with a small amount of cracks or impurities, translucent. Grade III: light yellow or yellowish brown, no animal or plant fossils, cracks and impurities, and transparent.

There are many kinds of amber and rich colors. According to the origin, amber can be divided into sea amber and mine amber; According to color, amber can be divided into Jin Po, Sherper, Beeswax and Shannon. Natural amber is not only divided into many varieties, but also has different grades.