Prehnite, Chabazite - image 1

Prehnite, Chabazite

Unknown Owner
While overshadowed by the tanzanites, the prehnites of Merelani Hills in Tanzania are equally impressive, in my opinion. They have superb form, color variety, luster, and aesthetics. This is a beautiful green example with a rare chabazite association. Very nice in person.

Product details

Species
PrehniteAbout Prehnite →
SizeSmall Cabinet
Dimensions3.5 x 5.0 x 8.0 cm
Added on12/13/2025
Locality
Tanzania, Manyara Region, Merelani HillsRegional guide →

Known provenance

DateCollectorAcquisition price
05/2026Unknown Owner$2,500.00
—Collector’s EdgeNot disclosed

Learn more

Prehnite
Mineral guide
Learn about Prehnite
apple- to mint-green crystals and sculptural botryoidal/rosette forms; a calcium aluminum silicate formed in low-temp hydrothermal environments.
Prehnite
Regional guide
Prehnite from Merelani Hills, Tanzania
Merelani Hills prehnite is one of the surprises of a locality that collectors first learned to revere for tanzanite. In hand specimen it is immediately recognizable: glassy yellow-green to lemon-yellow clusters, bright mint-green blades, and occasional blue to celestine-blue rosettes, commonly sharpened by the dark metallic contrast of graphite. The best examples have the translucency and internal glow of gem material, but with the crystallographic interest of discrete tabular, blocky, bladed, or rosette crystals rather than the more familiar botryoidal prehnite seen from many classic basalt localities.