Seagram uses clues found by Koplin .
Seagram determines that the byzanium -- a chunk worth more than a quarter of a billion dollars in 1912 figures -- was mined in the early part of the 20th century by a group of Coloradan miners , including Joshua Hayes Brewster .
Using clues found by Koplin , Seagram determines that the byzanium -- a chunk worth more than a quarter of a billion dollars in 1912 figures -- was mined in the early part of the 20th century by a group of Coloradan miners , including Joshua Hayes Brewster .