Database updated: 18 April 2014.
  Register Login
 
  Online Appraisal   .   Value Charts   .   Historical Values   .   GVA Index   .   Gems Info   .   How It Works   .   FAQ   .   News   .   About Us   .   Partners   .   Contacts
 

 

Iolite: average retail values, Apr 2014


Select gemstone type:

Data on alexandrites, diamonds, emeralds, opals, rubies, sapphires, spinels and tanzanites are available for subscribers only. Subscribe


Valuation date: 20 Apr 2014
Value chart for Iolite. Data valid till: 04 May 2014
Values in USD per carat; ref. clarity = VVS, ref. cut = Excellent

Color Color Description; Occurrence 1 ct. 3 ct. 5 ct. 10 ct. 30 ct.
dark Blue
Alternative name, occurrence category: Common
68.4397.86127.29200.87No data
161 - medium violetish Blue; very slightly greyish
Alternative name, occurrence category: Cordierite. Common
89.39127.83166.27262.38No data
159 - medium light violetish Blue; very slightly greyish
Alternative name, occurrence category: Cordierite. Common
74.20106.11138.03217.80No data
157 - light violetish Blue; strong
Alternative name, occurrence category: Cordierite. Common
58.4983.64108.79171.67No data
223 - colorless
Alternative name, occurrence category: Cordierite. Rare
105.64151.06196.49310.06No data

Approximate clarity coefficients:

Clarity grade VVS VS SI1 SI2 I1 I2 I3 OPQ
Value coefficient1.0000.9430.8740.7310.604---------

 

Value Charts: printable version  

Gems info: Iolite  

Appraisal  


 
 
Gemstone appraisal  .  How it works  .  Value charts  .  Historical prices  .  GVA index  .  Color grading system
Color system for opals  .  Gems info  .  Experts opinion  .  Weight distribution  .  Carat weight calculator
FAQ  .  News  .  Resources  .  About us  .  Contacts  .  Privacy Policy  .  Disclaimer  .  Site map