Difference between revisions of "Thulite"
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| − | [[File:Thulite wikipedia.jpg|thumb|Thulite (rosaline<br> Credit: Dave Dyet [www.dyet.com link]]] | + | [[File:Thulite wikipedia.jpg|thumb|Thulite (rosaline)<br>Credit: Dave Dyet [www.dyet.com link]]] |
== Description == | == Description == | ||
Revision as of 11:09, 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