The most abundant evidence of material culture found at Harappan sites is Pottery.

Pottery:
- Pottery is the most common artifact found at Harappan sites.
- It was used for various purposes, such as cooking, storing, and transporting food and water.
- The Harappan pottery is different from other contemporary pottery in the Indus Valley region, as it is more refined and decorated.
- The pottery was made using a wheel and was fired at high temperatures, making it durable.
- The pottery was decorated with various designs, such as geometric patterns, animal motifs, and human figures.

Other Evidence of Material Culture:
- Jewellery: Jewellery was also found at Harappan sites, including beads, bangles, and necklaces made of various materials, such as gold, silver, and semi-precious stones.
- Terracotta: Terracotta figurines of animals and humans were found at Harappan sites, which were probably used for religious and ritual purposes.
- Bronze Casting: Bronze objects, such as figurines and tools, were also found at Harappan sites, indicating the use of bronze technology.

Conclusion:
While all these artifacts provide valuable insights into the material culture of the Harappan civilization, pottery is the most abundant evidence found at Harappan sites. Pottery was used for various purposes and was highly refined and decorated, making it a significant aspect of the Harappan material culture.