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13 specimens found
1 | 2 |

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.
Prehnite crystals covered by Grossular
stock #18-AX-10-842
Jeffrey Mine, Asbestos
Quebec, Canada
4 x 3.2 x 2.1 CM (miniature)
price: $320
Late Summer 2018

A cluster of Prehnite crystals are almost completely covered with tiny colorless and white Grossular crystals. There are a few small areas of uncovered Prehnite where it can be seen that these are glassy and transparent. Colorless or white Garnet is very rare and the tiny Grossular here are nearly all transparent, mostly colorless with a few white translucent crystals. It is impossible to find this combination available unless from an oldcollections being dispursed.
Prehnite -elongated crystals
stock #18.1-393
Jeffrey Mine, Asbestos
Quebec, Canada
3.9 x 3 x 1.8 CM (small miniature/ large thumbnail (toenail))
price: $130
Late Summer 2018

The amazing Prehnite crystals from Jeffrey mine took many forms and habits, unlike anything ever seen elsewhere. Although Prehnite is not really a scarce mineral, sizable prismatic Prehnite crystals are incredibly rare. This prismatic Prehnite cluster is a good example, sharp, with some complete doubly terminated crystals to 3.8 CM long. The luster is pearly and the crystal tips are transparent, the body is more milky translucent. There is chipping only on the outer edges, the center area is pristine and undamaged. A good small miniature showing an elongated habit, wide center sections and with square cross section terminations.
Prehnite crystals -Vintage Swiss
stock #16.1-168
Muotta Naira, Piz Lai BlauNalps Valley, Tujetsch, Vorderrhein
Grischun (Grisons), Switzerland
11.3 x 6.4 x 2.6 CM (cabinet)
price: $375
Spring update

A matrix plate with clear light green Prehnite crystals to 1.4 CM scattered with smaller Prehnites and some tiny Epidote and Byssolite. Classic specimen, ex Charles Noll collection and a much older label from an unknown collection. In fine condition overall, the main crystals are pristine. Some crystals are also on the underside but the view shown is the logical display face.
Prehnite crystals on Diopside
stock #18.1-081
Jeffrey Mine, Asbestos
Quebec, Canada
4.6 x 2.8 x 1.9 CM (miniature)
price: $900
Spring update

A pair of well formed, isolated Prehnite crystals are nicely perched on a matrix of slender Diopside crystals. Excellent contrast and an unusual combination that is very esthetic. The display face of fully crystalized and fully damage free, which is remarkable with delicate Diopsides. Jeffrey mine has over the years produced the best Prehnite crystals in the world in many habits and colors. This miniature is remarkable for the perfection of form, a super Prehnite specimen from anyplace and quite fine even among good Jeffrey pieces.
Prehnite on Quartz
stock #17.1-695
Goboboseb Mts., Brandberg area,
Erongo Region, Namibia
9.7 x 7.7 x 4.3 CM (cabinet)
price: $180
Pre Holiday 2017

Balls of crystallized Prehnite (up to 2.5 CM) in perfect condition are set on a matrix of Quartz crystals. A few Quartz crystals have breaks but most are undamaged. From the Goboboseb mountains better known for their great Amethysts, this is a bright, colorful and lustrous piece in person.
Prehnite - Single euhedral crystal
stock #17.1-316
Jeffrey Mine, Asbestos
Quebec, Canada
2.1 x 1.3 x 1.4 CM (thumbnail)
price: $180
new june 17

A large, sharp, very pale green single crystal of Prehnite in blocky form. From the Jeffrey Mine, where some of the worlds best and largest Prehnite crystals were found. No damage and with good luster this is a nice thumbnail that shows the habit well. Prehnite is a rather common mineral but crystals over a half centimeter are very rare and only come from a few finds.
Prehnite -sharply crystalized
stock #A-16-480
Jeffrey Mine, Asbestos
Quebec, Canada
2.9 x 1.8 x 1.7 CM (small miniature/ large thumbnail (toenail))
price: $330
Spring 2017

A textbook form presented in a cluster of sharp crystals. Well crystallized prismatic Prehnite is quite rare and the best in the world are from old finds at the Jeffrey mine. This specimen is perfect by naked eye with only very tiny contacts and chipping found with 10X magnification. A delicate pale green that looks almost white in some light, this is just a whisker too large to be a thumbnail but could be trimmed to fit if desired. No stains or encrustations, just lustrous bright Prehnite.
13 specimens found
1 | 2 |