Gemstone Refractometer Refractive Index Chart 127 Gem Stones GIA

$Gem Refractometer GIA$

Gemstone Refractometer Refractive Index Chart 127 Gem 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)

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

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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