Datolite with Ilvaite

First Sovetskii Mine, Dalnegorsk, Kavalerovo Mining District, Primorskiy Kray, Far-Eastern Region  Russia (1996)

Specimen size: 12.4 × 10.3 × 3.9 cm = 4.9” × 4.1” × 1.5”
Main crystal size: 4.6 × 2.3 cm = 1.8” × 0.9”