Madagascar
9.6 carats
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General Information | ||||||||||
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A variety or type of: | Feldspar | |||||||||
Varieties/Types: | Spectrolite - Trade name for a Labradorite from Finland that shows the spectral colours especially effectively. | |||||||||
Chemical Formula |
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Physical Properties of Labradorite | ||||||||||
Mohs Hardness | 6 to 6.5Blue Chart Gem Identification (2010) , More from other references | |||||||||
Specific Gravity | 2.69 to 2.72Blue Chart Gem Identification (2010) , More from other references | |||||||||
Tenacity | BrittleGems, Sixth Edition (2006) , | |||||||||
Cleavage Quality | PerfectGemmological Tables (2004) , More from other references | |||||||||
Fracture | UnevenGems, Sixth Edition (2006) , | |||||||||
Refractive Index | 1.554 to 1.573Blue Chart Gem Identification (2010) , More from other references | |||||||||
Optical Character | Biaxial/+Blue Chart Gem Identification (2010) , More from other references | |||||||||
Birefringence | 0.007 to 0.011Blue Chart Gem Identification (2010) , More from other references | |||||||||
Pleochroism | From the Congo, red stones show weak pleochroism whilst greenstones have distinct greenish yellow to bluish green pleochroismGems, Sixth Edition (2006) , | |||||||||
Dispersion | Fatal error: Uncaught mysqli_sql_exception: Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8mb3_general_ci,COERCIBLE) for operation '=' in /var/www/gemdat/gemshow_class.php:690 Stack trace: #0 /var/www/gemdat/gemshow_class.php(690): mysqli->query() #1 /var/www/gemdat/gemshow_class.php(505): gemshow_class->showdata() #2 /var/www/gemdat/gemshow_class.php(1469): gemshow_class->showblock() #3 /var/www/gemdat/gshow.php(151): gemshow_class->do_optical() #4 {main} thrown in /var/www/gemdat/gemshow_class.php on line 690 |