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$7.99 Laminated GEM Refractometer Refractive Index Chart 127 Stones GIA

n/a

  • $ 799


Item Description: Laminated Gemstone Refractometer - Refractive Index Chart of 127 different Gemstones

GEM REFRACTIVE INDEX CHART (8.5" x 11" - 1 Page, 2 Sides)

FREE DOMESTIC S&H VIA USPS SNAIL MAIL

 

Name

 

 

Structure

 

 

Hardness

 

 

Specific Gravity

 

 

Refractive index

 

 

Doubly Refracting (bi-refraction)

 

 

Achroite ( Tourmaline )

 

 

Trigonal

 

 

7.5

 

 

3.06

 

 

1.62 - 1.64

 

 

0.018

 

 

Agate ( Chalcedony)

 

 

Trigonal

 

 

7

 

 

2.61

 

 

1.53 - 1.54

 

 

0.004

 

 

 

  

125+ Gemstones are labeled!

A Gem Refractometer without a Refractive Index Chart is like a thermometer without the reference to what is hot or cold!

A copy of this comes with each of our Gem Refractometers, but this listing is for a laminated version that will last a much longer time.

 


 

National Industrial Supply
30777 Rancho California #891420
Temecula, CA 92589, USA
Sales: 951.308.9269
Fax: 310.733.5480  -  E-mail: nisupply@gmail.com  -  Website: www.nisupply.com


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