Hi! Mine has it too. It's the culet of the stone, and is normal (not a defect).
Your ring is stunning. I just received my 8mm loose Winkcz Cartier Cushion. I noticed there is a small open spot directly in the center (its black in this photo because it's on a black cushion. Is this a defect? I don't think I see the open spot on your stone.
Aw, thanks! It really turned out beautifullyFabulous ring. (I had no idea I would see that here.)
And also a wonderful, educational thread, which is what brought me here.
I just dropped into this new forum to find out whether one could buy good cubic zirconias nowadays. Because I sold one of my 1.25 carat diamond earrings a few years ago and have been thinking that I might want to wear diamond studs of that size again. But I thought it would be nice if the studs actually looked like diamonds rather than chunks of glass.
I guess CZs have come a long way since the last time i bought them! Can anyone point me toward something to get me started rather than to plunge me in over my head with CZs in vintage cuts? (Help!)