Why does the centre look dark?

[flee12]

Is the dark part considered a window?

 

[Sagebrush]

Looks like one big honkin window to me. Its dark because the background is, your loosing about 40% of the stone''s brilliance through that black hole.

 

[Michael_E]

Maybe more of medium honkin'' window I suppose, with the BIG honkin'' window reserved for those that are over 50% of the width of the stone. Actually stones that are cut with checherboard crowns and apex crowns, having no flat table, will show a small window towards their center at a much lower angle when tilted, than if they had a table. With darker stones this always seems to be more prominent, I think because of the contrast between the bright pavilion flash and the dark window. If you could show a side view of the stone it would make a determination of its relative depth much easier. It''s so hard to tell from one picture, what''s going on.

 

[Edward Bristol]

Yes, the dark is from the back, meaning it is a window, though one must say that the checkboard covers it up quite well.

For a shallow stone a checkboard is a good choice. a normal table would have looked much worse...

if you can see it positive: it is a not-so-bad window
Edward Bristol
www.wildfishgems.com