Difference between revisions of "Thulite"
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| − | [[File:Thulite wikipedia.jpg|thumb|Thulite (rosaline)<br>Credit: Dave Dyet [www. | + | [[File:Thulite wikipedia.jpg|thumb|Thulite (rosaline)<br>Credit: Dave Dyet [https://www.flickr.com/photos/dyet/ link]]] |
== Description == | == Description == | ||
| − | A | + | A pale to deep pink translucent [[zoisite|zoisite]] stone in which manganese replaces up to 2 % of the calcium. Thulite was discovered near Telemark, Norway and named for Thule, an old name for Norway. It has been used as a gemstone and often has streaks of gray or white. |
==Synonyms and Related terms== | ==Synonyms and Related terms== | ||
Revision as of 12:12, 16 December 2022
Description
A pale to deep pink translucent Zoisite stone in which manganese replaces up to 2 % of the calcium. Thulite was discovered near Telemark, Norway and named for Thule, an old name for Norway. It has been used as a gemstone and 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