Idocrase. A mineral occurring in tetragonal crystals and also massive, of a brown to green color, rarely sulphur yellow or blue. It is a silicate of alumina and lime, with some iron and magnesia. It is common at Mt. Vesuvius.

---

“Do all thou doest as unto Christ, as immediately dealing with Christ Jesus, as if he were looking on thee, and though on him, and fetch all thy strength from him.”
–Thomas Wilcox, A Choice Drop of Honey