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Home / Gem Library / Gemstones Varieties / Prehnite July 25, 2008

Natural Prehnite

Prehnite is an orthorhombic mineral which is rarely found as distinct crystals. Found in association with volcanic rocks, it usually forms in aggregates with botryoidal habit. Prehnite is typically pale green to yellowish green with a white streak. It is named after a Dutchman, Colonel H. von Prehn, who discovered the mineral at the Cape of Good Hope, South Africa, and brought the first specimens to Europe.


  • There are 4 Prehnite gemstones available at Multicolour.com
  • Prehnite(s) are organized in the following categories: Mixed Lot,  gemstones.
  • Our most expensive Prehnite is USD 18.36 and largest Prehnite weight is CTS 6.12.
  • Our cheapest Prehnite is USD 13.20 and smallest Prehnite weight is CTS 4.40.

Prehnite Profile

Color information: yellow green, brown, yellow brown, oil green
Refractive Index: 1.61 - 1.64
Chemical Composition: (CA2Al2SI3O10(OH)2)
Hardness: 6
Density: 2.80 - 2.95
Crystal Group: Orthorhombic
Ocurrence: China, France, U.S.A., Scotland, Australia
Sign of the Zodiac: N/A
Month of the year: N/A
Prehnite Prehnite
Prehnite occurs most commonly in veins and cavities in igneous rocks, often in association with zeolites. Prehnite is never clean enough to produce bright faceted gemstones but beautiful yellow to blue green cabochons can be cut from the right material.

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Prehnite range/
Prehnite Mixed Lot
Prehnite Mixed Lot Round Slightly to Heavily included
Weight: 6.12 CTS
Shape: Round
Clarity: Slightly to Heavily included
Usually ships within 24 hours
RECOMMENDED
OUR PRICE
USD 18.36
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Prehnite Mixed Lot
Prehnite Mixed Lot Oval Slightly to Heavily included
Weight: 4.40 CTS
Shape: Oval
Clarity: Slightly to Heavily included
Usually ships within 24 hours
RECOMMENDED
OUR PRICE
USD 13.20
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