The term "rich leather" refers to a high-quality, supple and luxurious type of leather that is typically used in making expensive or premium products such as handbags, shoes, furniture, etc. This type of leather is known for its softness, durability, and elegance, which makes it highly desirable among those who appreciate fine craftsmanship and quality materials. The term "rich" suggests that the leather has a high level of quality and luxury, making it more valuable than other types of leather.