Difference between revisions of "Thulite"
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== Description == | == Description == | ||
| − | A minor ornamental stone that is a pink variety of zoisite. Thulite was discovered near Telemark, Norway and named for Thule, an old name for Norway. The transparent pink stone has been used as a gemstone. | + | A minor ornamental stone that is a pink variety of [[zoisite|zoisite]]. Thulite was discovered near Telemark, Norway and named for Thule, an old name for Norway. The transparent pink stone has been used as a gemstone. It is often has streaks of gray or white. |
| − | + | ==Synonyms and Related terms== | |
| + | zoisite; rosaline | ||
== Physical and Chemical Properties == | == Physical and Chemical Properties == | ||
| + | |||
| + | * Luster = vitreous | ||
| + | * Fracture = conchoidal to uneven | ||
| + | * Fluorescence = inert | ||
| + | * Pleochroism = present; and possibly dichroism or trichroism depending on color | ||
| + | |||
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
| Line 13: | Line 20: | ||
! scope="row"| Density | ! scope="row"| Density | ||
| 3.2-3.4 g/ml | | 3.2-3.4 g/ml | ||
| + | |- | ||
| + | ! scope="row"| Refractive index | ||
| + | | 1.691 - 1.700 | ||
| + | |- | ||
| + | ! scope="row"| Birefringence | ||
| + | | 0.006 - 0.018 | ||
|} | |} | ||
==Resources and Citations== | ==Resources and Citations== | ||
| − | + | * Gem Identification Lab Manual, Gemological Institute of America, 2016. | |
| + | * Wikipedia [https://en.wikipedia.org/wiki/Thulite Thulite] Accessed Dec 2022 | ||
* Mineralogy Database: [http://www.webmineral.com/data/Zoisite.shtml Zoisite] | * Mineralogy Database: [http://www.webmineral.com/data/Zoisite.shtml Zoisite] | ||
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 11:05, 16 December 2022
Description
A minor ornamental stone that is a pink variety of Zoisite. Thulite was discovered near Telemark, Norway and named for Thule, an old name for Norway. The transparent pink stone has been used as a gemstone. It is often has streaks of gray or white.
Synonyms and Related terms
zoisite; rosaline
Physical and Chemical Properties
- Luster = vitreous
- Fracture = conchoidal to uneven
- Fluorescence = inert
- Pleochroism = present; and possibly dichroism or trichroism depending on color
| Mohs Hardness | 6.0 - 6.5 |
|---|---|
| Density | 3.2-3.4 g/ml |
| Refractive index | 1.691 - 1.700 |
| Birefringence | 0.006 - 0.018 |
Resources and Citations
- Gem Identification Lab Manual, Gemological Institute of America, 2016.
- Wikipedia Thulite Accessed Dec 2022
- Mineralogy Database: Zoisite