Note 3031 — BOOK XXXVII. THE NATURAL HISTORY OF PRECIOUS STONES.

Supposed by Ajasson to be the Euclase, a brittle green stone, composed of silica, alumina, and glucina. Haüy gave it this name from the Greek words εὖ, “easily” and κλάω, “to break.” According to Dana, however, Euclase was first brought from Peru: if such is the fact, we must, perhaps, look for its identification in Epidote, a green silicate of alumina.