Understanding the Windmill Cut: A Labradorite Faceting Style

Question
About a week ago, I was watching Jewelry TV and the host called a cut on a Labradorite stone "Windmill Cut".  It appeared to have a very smooth convex top... no faceting on the top of the stone but appeared some faceting on the underside.  It was beautiful. A friend of mine has an  Alexandrite cut in the same fashion and I have never been able to locate anything on the type of cut until this show.  Can you help me find more information out about the cut and what it is exactly referred to?  Thank you very much.

Answer
HI KAREN,

MOST CUTS ARE NAMED BY THE CUTTER WHO INVENTED THE CUT. USUALLY HAPPENS WHEN A CUTTER GETS AN UNUSUAL OR DIFFICULT PIECE OF ROUGH TO CUT. THEY WILL FIND THE BEST WAY TO CUT IT TO RETAIN THE MOST WEIGHT AND GET THE BEST COLOR/BRILLIANCE FROM THE STONE. HOPEFULLY! BUT THIS DOESN'T ALWAYS HAPPEN AND YOU NEVER SEE THOSE CUTS ON THE MARKET. SOMETIMES THEY WORK AND SOMETIMES THEY DON'T AND SOME TAKE TIME TO DEVELOP INTO FINE CUTS. THERE ARE MANY BOOKS DONE BY LAPIDARIES SHOWING HOW THEY CUT STONES  AND WHAT THEY LOOK LIKE WHEN FINISHED. I HAVE NOT SEEN THIS PARTICULAR CUT IN ANY JOURNAL LATELY BUT I'M SURE IT WILL BE OUT SOON. A WELL DESIGNED CUT GETS AROUND QUICK.

PETER