Long, cylindrical reddish-brown amber beads. This rare amber is known as burmite, a type of fossilised amber that originates in  Kachin State, and which was known to the Chinese as early as the Han period (206 BC-220 AD).
This type of necklace was worn by Mizo women in what is now Mizoram state, formerly part of India’s Assam state. The Mizos prized amber for its reddish-brown mottled colour. One can see ancient debris caught in the amber. There is wear according to age. 
Restrung with black glass cylinder beads.
Weight 112 grams
Related examples are in Untracht (1997, p. 82).
References:
“Colliers ethniques d’Afrique d’Asie, d’Océanie et d’Amérique”, Leurquin, Anne, Skira, 2003
“Ethnic jewellery and adornment”, Daalder, Truus, Ethnic Art Press, 2009