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andalusite


Andalusite
Photo courtesy of High Life Living Luxury
Species:  Andalusite
Mohs Hardness:  6.5 to 7.5 out of 10
Color:  Black, white, gray, green, yellow, pink, brown and orange

RI:  1.634 to 1.643
Birefringence:  +/- 0.005
SR/DR/AGG:  DR
Clarity Type:  Type II
Pleochroism:  Strong, colors vary depending on gem's bodycolor
Spectrum:  Not diagnostic

Fluorescence:  Variable, not diagnostic
SG:  3.17

andalusite facts


Andalusite occurs in many different colors.

Andalusite displays strong pleochroism which is often visible with the naked eye.
​
  • HOME
  • ABOUT US
  • SHOP
  • GEMOLOGY
    • GEM ENCYCLOPEDIA
    • REFRACTIVE INDEX CHART
    • BIRTHSTONE CHART
    • DECORATIVE PRINTS
    • THE ART OF GEMOLOGY
  • APPRAISALS
    • INSURANCE
    • DIVORCE
    • ESTATE TAX
    • ESTATE DISTRIBUTION
    • CHARITABLE DONATION
    • LIQUIDATION
    • APPRAISALS THRU EMAIL
  • SELL YOUR JEWELRY
  • JEWELRY EDUCATION
    • DIAMOND FACTS
    • JEWELER DIRECTORY
    • JEWELRY PERIODS
    • POCKET WATCHES
    • NATIVE AMERICAN JEWELRY
  • GLOSSARY