Complex sentence: Most of the ornaments of the Tangkhuls such as kongsang, huishon, etc. were made of sea shells, cowrie and conch shells a prominent feature of the people who live on the shore.
Split into simpler sentences: Most of the ornaments of the Tangkhuls such as kongsang and huishon were made of sea shells. Cowrie and conch shells are prominent features of the people who live on the shore.