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.

---

“Now to him who is able to do immeasurably more than all we ask or imagine, according to his power that is at work within us,”
– Ephesians 3:20