Note 30 — Chapter XI · SOURCE OF DIAMONDIFEROUS SOIL.—EXTRACT FROM MESSRS. BAIN, URE, DANA AND OSBORNE’S GEOLOGICAL THESES.—VARIOUS THEORIES ADVANCED—NONE ENTIRELY SATISFACTORY OR CONCLUSIVE.—THE ORIGIN OF THE PRECIOUS STONE VEILED IN MYSTERY.
Reading edition
Resembling charcoal in its mineral condition.