- Joined
- Jun 29, 2008
- Messages
- 10,261
Chrono|1350471195|3286924 said:I have to disagree with the professional opinion of the respected lapidary. Head reflection or head shadow is only observable when the stone is veiwed up very close to the face. It is an effect seen in all shaped stones when your head casts a shadow onto the stone. The darkness seen across the middle of emerald cuts are sometimes called a bow-tie, due to a combination of cutting and light play (we discussed this earlier with Richard Hughes' explanation in a previous link). You should not see this effect from an arm's length away, which is why I advised making sure you don't video the stone too close to the camera.
Discussion with various experts and lapidaries on the same topic:
[URL='https://www.pricescope.com/community/threads/how-much-head-reflection-is-acceptable.165443/#post-3014437#p3014437']https://www.pricescope.com/community/threads/how-much-head-reflection-is-acceptable.165443/#post-3014437#p3014437[/URL]
[URL='https://www.pricescope.com/community/threads/extinction.154628/']https://www.pricescope.com/community/threads/extinction.154628/[/URL]
Absolutely agree with the above. The half/half is not caused by head shadow and is not a bow tie effect either.