Natrolite Gemstones by Colour
This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 |  |  |  |  |  |
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:1.05 cts
Heaviest:4.98 cts
Average:2.74 cts
Total photos:6
Do you have a larger Natrolite? Why not upload a photo?
| General Information | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Formula |
| |||||||||||||||||||||
| 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 | ||||||||||||||||||||||
| ||||||||||||||||||||||