Gemstone Refractometer Refractive Index Chart 127 Gem Stones GIA
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
|
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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