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I Re-cut this Blue Sapphire into a cushion shape
to close the Window

Picture of a cushion blue Sapphire.

A jeweler send me the Blue Sapphire pictured below. The stone was shallow and had a bad window, as you can see. He could see the potential in the stone and asked me what it would take to close the window.

I suggested that we could turn the round Sapphire into a rectangular cushion cut which would have a narrower width and would preserve the 'length' of the stone, thereby saving some weight. The jeweler liked the idea of a cushion cut.

Below, you will see photos and description of the cutting process.


Round Sapphire with a large window

After examining the stone, I determined that the stone was too shallow and the diameter needed to be taken in, in order to close the window.

An arrow telling users to click on the photo to make it larger.


The first cuts

Here I have made the first 3 facets on each side of the stone.

I have made them at angles which will close the window.


Pavilion is nearly finished

Here you can see that most of the pavilion facet pattern is in place and also polished.


End view

This shows a view of the facets at the ends of the stone which appear a bit different from those on the sides.


Working on the crown

After re-faceting a stone which required making the width of the stone narrower, it is almost always necessary to re-cut the crown because the girdle has become so much thicker on the sides which were taken in during the re-shaping.

In this photo you can see I have roughly ground the main facets on the sides as a first step in making the new crown.


The Sapphire is Finished!

Here you can see the finished stone.

The window is closed. The color is improved and the stone is also more brilliant.

→ Take me back to examples of Re-faceting gemstones to close their Windows


Denton Anderson,
Gemologist & Gem Cutter
click photo for Video

Photo of Denton the gem cutter.

Graduate Gemologist, GIA, GG
Over 20 years of experience.