The author saw one of these stones at St. Petersburg which was exquisitely cut and clear as a crystal, though green in color, for which the sum of three thousand roubles was demanded.
"Due North or Glimpses of Scandinavia and Russia"
Maturin M. Ballou
The light had gradually brightened, and the storms passed off and left a keen, cold air, which was as clear as crystal.
"My Attainment of the Pole"
Frederick A. Cook
These lines of crystal made an amazing dash of light and color as we looked at each other.
"My Attainment of the Pole"
Frederick A. Cook