Volkesfeld, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
5.25 carats
© Alfredo Petrov
General Information | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
A variety or type of: | Orthoclase, which is a variety of Feldspar | |||||||||
Chemical Formula |
| |||||||||
Sanidine Treatments | ||||||||||
Some sanidine subjected to iridation turns amber or smoky coloured. | ||||||||||
Physical Properties of Sanidine | ||||||||||
Mohs Hardness | 6Blue Chart Gem Identification (2010) , More from other references | |||||||||
Specific Gravity | 2.54 to 2.61Blue Chart Gem Identification (2010) , More from other references | |||||||||
Tenacity | BrittleGems, Sixth Edition (2006) , | |||||||||
Cleavage Quality | GoodGems, Sixth Edition (2006) , Excellent to good | |||||||||
Fracture | Uneven,ConchoidalGems, Sixth Edition (2006) , | |||||||||
Refractive Index | 1.518 to 1.536Blue Chart Gem Identification (2010) , More from other references | |||||||||
Optical Character | Biaxial/-Blue Chart Gem Identification (2010) , More from other references | |||||||||
Birefringence | 0.005 to 0.008Blue Chart Gem Identification (2010) , More from other references | |||||||||
Pleochroism | WeakGems, 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 |