The 'Golden Pearl' tea was owned by AFT Techno Trade and was bought by Assam Tea Traders.
Factors like plucking tea buds in the early morning hours and at specific times of the year, and cutting and rolling the tea manually, matter, say tea producers.
The Manohari Tea Estate, that grows the tea in the estates of Assam's Dibrugarh, sold a kilogram to Sourabh Tea Traders at an auction this week.