Difference between revisions of "Prasiolite"

From CAMEO
Jump to navigation Jump to search
Line 5: Line 5:
 
== 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 ==
 
+
 
* Insoluble in acids except for hydrofluoric acid. Slightly soluble in alkalis. 
 
 
* Trigonal crystal system.  Low birefringence. Low thermal expansion.   
 
* Trigonal crystal system.  Low birefringence. Low thermal expansion.   
* Fracture = conchoidal.  
+
* Fracture = conchoidal   
* Luster = vitreous to greasy.  
+
* Luster = vitreous   
* Streak = white.
+
* Streak = white
* Microscopically, particles are transparent. 
 
* Crossed polars shows low birefringence and first order grays
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 23: Line 20:
 
! scope="row"| Density
 
! scope="row"| Density
 
| 2.65-2.66 g/ml
 
| 2.65-2.66 g/ml
 +
|-
 +
! scope="row"| Refractive Index
 +
| 1.544; 1.553
 
|-
 
|-
 
! scope="row"| Refractive Index
 
! scope="row"| Refractive Index
 
| 1.544; 1.553
 
| 1.544; 1.553
 
|}
 
|}
 +
 +
==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]]

Revision as of 14:25, 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 = white
Mohs Hardness 7.0
Density 2.65-2.66 g/ml
Refractive Index 1.544; 1.553
Refractive Index 1.544; 1.553

Resources and Citations

  • Mineralogy Database: Quartz
  • Gem Identification Lab Manual, Gemological Institute of America, 2016. (Praseolite quartz)
  • Wikipedia: Prasiolite (Accessed Dec 2022)

Retrieved from "https://cameo.mfa.org/index.php?title=Prasiolite&oldid=95195"