Difference between revisions of "Prasiolite"
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== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| − | vermarine; lime citrine; prase; chert | + | vermarine; lime citrine; praseolite quartz; prase; chert |
== Physical and Chemical Properties == | == Physical and Chemical Properties == | ||
| − | + | ||
| − | |||
* Trigonal crystal system. Low birefringence. Low thermal expansion. | * Trigonal crystal system. Low birefringence. Low thermal expansion. | ||
| − | * Fracture = conchoidal | + | * Fracture = conchoidal |
| − | * Luster = vitreous | + | * Luster = vitreous |
| − | * Streak = white | + | * Streak = colorless to white |
| − | * | + | * Fluorescence = generally inert |
| − | * | + | * Pleochroism = weak |
{| class="wikitable" | {| class="wikitable" | ||
| Line 26: | Line 25: | ||
! scope="row"| Refractive Index | ! scope="row"| Refractive Index | ||
| 1.544; 1.553 | | 1.544; 1.553 | ||
| + | |- | ||
| + | ! scope="row"| Birefringence | ||
| + | | 0.009 | ||
|} | |} | ||
| + | |||
| + | ==Resources and Citations== | ||
| + | |||
| + | * Mineralogy Database: [http://www.webmineral.com/data/Quartz.shtml Quartz] | ||
| + | * Gem Identification Lab Manual, Gemological Institute of America, 2016. (Praseolite quartz) | ||
| + | * Wikipedia: [https://en.wikipedia.org/wiki/Prasiolite Prasiolite] (Accessed Dec 2022) | ||
[[Category:Materials database]] | [[Category:Materials database]] | ||
Latest revision as of 15:28, 21 December 2022
Description
A rare, green transparent Quartz that contains small amounts of hydrated nickel silicate. Prasiolite is a rare stone in nature, but can sometimes be formed by the heat treatment of Amethyst. It is sometimes confused with Chrysoprase, which is more translucent.
Synonyms and Related Terms
vermarine; lime citrine; praseolite quartz; prase; chert
Physical and Chemical Properties
- Trigonal crystal system. Low birefringence. Low thermal expansion.
- Fracture = conchoidal
- Luster = vitreous
- Streak = colorless to white
- Fluorescence = generally inert
- Pleochroism = weak
| Mohs Hardness | 7.0 |
|---|---|
| Density | 2.65-2.66 g/ml |
| Refractive Index | 1.544; 1.553 |
| Birefringence | 0.009 |
Resources and Citations
- Mineralogy Database: Quartz
- Gem Identification Lab Manual, Gemological Institute of America, 2016. (Praseolite quartz)
- Wikipedia: Prasiolite (Accessed Dec 2022)