17MRP61: Spheroidal growth of Prehnite crystals with perfect terminations, translucent, with a very bright luster and an intense yellow color, with small black traces of Graphite. Comes from a mine that is world-renowned for its tsavorites and tanzanites, but which has also yielded several other mineral species, including this aesthetic Prehnite, in addition to 3 type locality (TL) species.
Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region  Tanzania

Specimen size: 3.3 × 2.7 × 2.1 cm = 1.30” × 1.06” × 0.83”