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20 specimens listed
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Prehnite
stock #19.1-652
Merelani Hills, Lelatama Mountains, Simanjiro District
Manyara Region, Tanzania
5.9 x 3.7 x 3.4 CM (cabinet)
price: $300


"Cockcomb" habit spray of well defined Prehnite crystals from the recent finds at Merlani. The individual crystals are flattish blade type with distinct individual terminations, up to 2.6 CM tall. The Prehnite is all translucent, has a bright luster and a pleasing green to yellow hue. The white clusters are Calcite (fluorescent) with a few Pyrite cubes scattered about . These Tanzanian Prehnites are a very good value and can have outstanding form. This is a choice example.
Prehnite and Apophyllite - Classic locale
stock #17.1-649
Loanhead Quarry, Beith
Strathclyde, Scotland
5.9 x 4.7 x 3.4 CM (cabinet)
price: $290


Yellow Prehnite in a crystalline ball from the Loanhead Quarry, Scotland. A single gem clear Apophyllite crystal is a fine contrast. From the Les Hitchings collection, this was collected by him in 1974 during an extended trip to Scotland where he spent weeks digging in the Glasgow area. This was the best Prehnite he obtained.
Prehnite- gemmy large crystals
stock #19.1-651
Merelani Hills, Lelatama Mountains, Simanjiro District
Manyara Region, Tanzania
5.8 x 4.6 3.4 CM (cabinet)
price: $520
Spring 2020

A large rosette of sharp Prehnite crystals that are translucent to transparent, lustrous and colorful. Green exterior with a more yellow core area, a fine example from the amazing finds at Merelani, Tanzania. This area is incredibly rich mineral wise, it is best known of course as the source of Tanzanite but also incredible fine Diopside and these unusual but beautiful Prehnites. Most of the Merelani Prehnites have considerable damage or bruising, this piece is a more choice example, far better than average, with esthetic and distinct crystals. In excellent condition except at the bottom where this was attached.
Prehnite - sharp gemmy crystals
stock #AX-24-495
Jeffrey Mine, Asbestos
Quebec, Canada
3.4 x 2.7 x 2 CM (small miniature/ large thumbnail (toenail))
price: $780
Spring 2020

Prehnite crystals which are unusually sharp, clear and distinct with textbook perfect form. An older specimen from the Jeffrey Quarry in Quebec which was at one time an incredible source of fine and often unique Prehnites. This is in flawless condition damage-wise. The matrix is a mix of needle crystals of Pectolite and micro Natrolite. The matrix is fluorescent as well. Very much a three dimensional specimen that displays well from almost any angle, the overall esthetics are impressive.
colorless Grossular on Prehnite
stock #AX-24-475
Jeffrey Mine, Asbestos
Quebec, Canada
3.7 x 2.4 x 2.1 CM (small miniature/ large thumbnail (toenail))
price: $440
Spring 2020

Doubly terminated Prehnite (3.7 CM) crystal showing sharply striated, glassy faces encrusted with small colorless Grossular crystals. One of the rarest colors for Garnet are the clear or white crystals which were found more than 30 years ago at the Jeffrey Quarry. Just as uncommon is the vivid fluorescence (orange to red) of these Grossular. The underlying Prehnite shows through on several areas of the specimen and is highly lustrous with distinct stepped structures and striations. No damage, a rare and choice combination from a classic, extinct locale. I understand this combination (Prehnite with colorless, fluorescent Grossular) is unique in this one find, and never seen elsewhere on the planet.
Prehnite -well crystallized with Pectolite
stock #AX-16-543
Jeffrey Mine, Asbestos
Quebec, Canada
4.7 x 3.3 x 3.2 CM (miniature)
price: $500
Spring 2020

Some of the best Prehnite ever found came from the Jeffrey Quarry and it came in many different habits and colors. The orange color on this piece is quite rare and the well isolated crystals reach to just under 2 CM. The crystals also show the curved and twisted faces that give a rounded, globular look at first glance. The matrix also hosts many needle crystals of Pectolite that add some sparkle on close inspection. Damage free, this is a well composed piece with the largest crystals prominently positioned. A choice Prehnite from anyplace and an especially fine, rare type from the Jeffrey Quarry.
Prehnite -very well crystallized
stock #AX-24-496
Jeffrey Mine, Asbestos
Quebec, Canada
3.6 x 2.8 x 2.1 CM (miniature)
price: $480


Unusually sharp and transparent crystals of Prehnite in an esthetic cluster. The crystals are in fine undamaged condition and this specimen has a lot of display impact. The Jeffrey mine is famed for its Garnets and Vesuvianite but the Prehnites found here were world class and of incredible variety. This is an excellent example showing the elongated blocky form with a delicate light green hue. Even though Prehnite is not a rare mineral and is found worldwide, good sharp crystals are rare and these from the Jeffrey are unique. Not found for some years, these are modern classics and no others from elsewhere have this look and habit.
Prehnite -well crystalized
stock #18.1-587
Merelani, Umba Valley, Lelatama Mountains, Arusha Region
Manyara Region, Tanzania
5.7 x 3.9 x 3.2 CM (cabinet)
price: $300
Dec 2018

Radiating cluster of fine terminated Prehnite crystals from the famed Merelani Hills best known for its Tanzanite. In fine condition by naked eye, some very minor bruising is seen with magnification, but overall the visual impression is pristine. This is also a color-changing Prehnite and can look green to a gray-blue depending on the light source. Some of the crystals also show slight rotation or twisting like some of the classic European Alpine specimens.
20 specimens listed
Page   1 | 2 | 3 |