Indian Gemological Institute - Gem Testing Laboratory, Delhi examined a Synthetic Colorless Sapphire.
Weight: 4.89 ct
Color: Colorless
Shape/Cut: Oval mixed cut.
Properties were consistent for sapphire, but the stone had no inclusion to conclude the stone to be synthetic.
As the stone was colorless no curved striations were visible, but in Diamond View curved growth striations were visible concluding the stone to be synthetic.
Sapphire was transparent in SSEF diamond spotter, green dot glow proved that the stone is a synthetic manufactured by flame fusion process. (natural sapphires are never transparent to short wave UV transparency, flux synthetic sapphire can also be opaque in short wave UV transparency).
NOTE:
Original article is published in Gems & Gemology, Fall 2013, Volume 49, Number 3.
Link:
http://emeraldinchelsea.blogspot.in/
Weight: 4.89 ct
Color: Colorless
Shape/Cut: Oval mixed cut.
Properties were consistent for sapphire, but the stone had no inclusion to conclude the stone to be synthetic.
As the stone was colorless no curved striations were visible, but in Diamond View curved growth striations were visible concluding the stone to be synthetic.
Sapphire was transparent in SSEF diamond spotter, green dot glow proved that the stone is a synthetic manufactured by flame fusion process. (natural sapphires are never transparent to short wave UV transparency, flux synthetic sapphire can also be opaque in short wave UV transparency).
NOTE:
Original article is published in Gems & Gemology, Fall 2013, Volume 49, Number 3.
Link:
Comments and suggestions are welcome.
(Photographs are taken by the author.)
Author:
Meenakshi Chauhan
Indian Gemological Institute - Gem Testing Laboratory
Jhandewalan, Delhi
(Project of GJEPC)
Link to author's other blogs
http://emeraldinchelsea.blogspot.in/
