Natrolite
Chimney Rock Quarry, Bridgewater Township, Somerset County, New Jersey, USA
0.68 carats
© Brian Kosnar - Mineral Classics
Natrolite produce some fine crystal specimens. The mineral is also often found as compact fibrous aggregates. It is usually white or colorless, sometimes reddish, greenish or yellowish. The luster is vitreous, finely fibrous specimens have silky luster.
Colourless facet rough natrolite is seldom.
Natrolite Gemstones by Colour
This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
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Natrolite Gemstones by Size
This table shows distribution of Natrolite gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:0.61 cts
Heaviest:4.98 cts
Average:1.97 cts
Total photos:12
Do you have a larger Natrolite? Why not upload a photo?
| General Information | ||||||||||||||||||||||
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| Chemical Formula |
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| Physical Properties of Natrolite | ||||||||||||||||||||||
| Mohs Hardness | 5 to 5.5, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||
| Specific Gravity | 2.20 to 2.26, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||
| Tenacity | Brittle, Gemstones (2009) | |||||||||||||||||||||
| Cleavage Quality | Perfect, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||
| Fracture | Irregular, Gemstones (2009) | |||||||||||||||||||||
| Optical Properties of Natrolite | ||||||||||||||||||||||
| Refractive Index | 1.478 to 1.493, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||
| Optical Character | Biaxial/+, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||
| Birefringence | 0.012 to 0.013, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||
| Pleochroism | Nil, Gemstones (2009) | |||||||||||||||||||||
| Dispersion | Weak, Gemstones (2009) | |||||||||||||||||||||
| Colour | ||||||||||||||||||||||
| Colour (General) | Colourless, yellowish, white, gray, brownish, Gemmological Tables (2004) More from other references | |||||||||||||||||||||
| Transparency | Transparent,Translucent,Opaque, Gemmological Tables (2004) More from other references | |||||||||||||||||||||
| Lustre | Vitreous, Gemstones (2009) | |||||||||||||||||||||
| Crystallography of Natrolite | ||||||||||||||||||||||
| Crystal System | Orthorhombic, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||
| Habit | Fibrous aggregate, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||
| Geological Environment | ||||||||||||||||||||||
| Where found: | Occurs in cavities in amygdaloidal basalts and related igneous rocks in association with other zeolites, Gems, Sixth Edition (2006) | |||||||||||||||||||||
| Inclusions in Natrolite | ||||||||||||||||||||||
| Common rod-like yellowish-brown inclusions (acmite) - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 9 | ||||||||||||||||||||||
| Further Information | ||||||||||||||||||||||
| Mineral information: | Natrolite information at mindat.org | |||||||||||||||||||||
| Significant Gem Localities | ||||||||||||||||||||||
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