Prehnite
Chemical composition -- A hydrated calcium aluminum silicate with iron.
Color -- Various shades of green, yellow, gray, or white.
PREHNITE
Overview: Prehnite is a hydrous, calcium-aluminum-silicate mineral, which is commonly found in cavities and "pillows" . Prehnite is an attractive mineral that can have a very good luster.
Prehnite used in Jewelry
Source: Australia, Canada, China, Germany, India, Namibia, Scotland, South Africa, USA ...
Prehnite’s bright, almost luminescent, swirling green colors (reminiscent of jade), mesmerizing clarity and striking luster, make it an extremely attractive collector’s gem.
Prehnite (-079)
aka Cape Emerald, Green Tourmalated Quartz
This pale green stone has the distinction of being the first mineral named after a person.
Prehnite
Prehnite is a hydrated calcium aluminum silicate which is commonly formed in rock cavities. It is translucent and it's colour varies in light green, yellow green or white.
PREHNITE
Gemstone Physical Composition: Prehnite is a pinacoidal phyllosilicate that typically occurs within cavities of igneous rock formed through hydro-thermal action.
PREHNITE
Hand specimens of prehnite, occasionally associated with native copper and connellite,
are a recent addition to the minerals that may be found on Skye.
prehnite, apophyllite, wollastonite, diopside, copper, quartz, stilbite, heulandite
Locals:
Misc: ...
Prehnite"Bottle-green mineral of low-grade metamorphic rocks.
Psilomelane"Manganese oxides make up this black crusty mineral.
Pyrite""Fool's gold" and the most important sulfide mineral.
"Next to my bed are Prehnite, garnets, chrysophase, rutilated quartz and onyx rocks, these are stones I often carry and like to have them close. Under the pillow I have Kyanite for clear, sweet dreams, works for me.
Prehnite Color: Yellow-green, brown-yellow. Transparent, translucent. Named after Dutch colonel. It has a vitreous to mother-of-pearl luster. Prehnite cats eye occurs. Deposits are found in Australia, China, Scotland, South Africa, and the USA.
8H2O], prehnite [Ca2Al2Si3O10(OH)2+Fe], and chrysocolla [(Cu,Al)2H2Si2O5(OH)4.nH20] are all closely related to and very difficult to distinguish from the clorite group.
But if the subject is a specimen of etched green prehnite with no brilliant highlights, the camera will not see any white highlight pixels in the image and think color correction is necessary.
Malachite which commonly takes this form and is widely available is less valuable, say, than Smithsonite, which is a much rarer material, or than botryoidal prehnite which comprises only a tiny fraction of all prehnite.
The other form produces a blue to blue-green botryoidal crust that resembles smithsonite or prehnite. There are times when hemimorphite demonstrates rough crystal ridges or "cock's comb" structures over top of the basic botryoidal crust.
Other fake stones are Vanadium emerald is green beryl colored with vanadium, Uralian emerald is garnet, Cape emerald is prehnite, Prismatic emerald is euclase and Oriental emerald is green coloured sapphire.
Kharan district - Brookite, anatase, and quartz
Chaman (near Quetta) - Diamond quartz, window quartz, quartz on prehnite-base, and faden quartz included by chlorite
Websites
Pakistan ...
PREHNITE Inner peace, union of the heart and the will
PROPHECY STONE Grounding spiritual Light in the physical self and the world, seeing prophetic visions
PYRITE Masculine energy, manifestation, action ...
 See also: Crystal, Mineral, Crystals, Quartz, Stone
  
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