Difference between revisions of "Prasiolite"
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m (MDerrick moved page Prase to Prasiolite without leaving a redirect) |
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== Description == | == 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 == | == Synonyms and Related Terms == | ||
| − | chert | + | vermarine; lime citrine; prase; chert |
| + | == Physical and Chemical Properties == | ||
| + | |||
| + | * Insoluble in acids except for hydrofluoric acid. Slightly soluble in alkalis. | ||
| + | * Trigonal crystal system. Low birefringence. Low thermal expansion. | ||
| + | * Fracture = conchoidal. | ||
| + | * Luster = vitreous to greasy. | ||
| + | * Streak = white. | ||
| + | * Microscopically, particles are transparent. | ||
| + | * Crossed polars shows low birefringence and first order grays | ||
| + | |||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | ! scope="row"| Mohs Hardness | ||
| + | | 7.0 | ||
| + | |- | ||
| + | ! scope="row"| Density | ||
| + | | 2.65-2.66 g/ml | ||
| + | |- | ||
| + | ! scope="row"| Refractive Index | ||
| + | | 1.544; 1.553 | ||
| + | |} | ||
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 15:03, 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; prase; chert
Physical and Chemical Properties
- Insoluble in acids except for hydrofluoric acid. Slightly soluble in alkalis.
- Trigonal crystal system. Low birefringence. Low thermal expansion.
- Fracture = conchoidal.
- Luster = vitreous to greasy.
- Streak = white.
- Microscopically, particles are transparent.
- Crossed polars shows low birefringence and first order grays
| Mohs Hardness | 7.0 |
|---|---|
| Density | 2.65-2.66 g/ml |
| Refractive Index | 1.544; 1.553 |