Note 3159 — BOOK XXXVII. THE NATURAL HISTORY OF PRECIOUS STONES.
John Bostock translation
This must not be taken for the Sapphire of the present day, but was most probably Lapis lazuli, and identical, perhaps, with Cyanos. Beckmann has devoted considerable attention to this subject; Hist. Inv. Vol. I. pp. 468-473. Bohn’s Edition.