C.J.'s Sapphire #2

[@rrudd117]

Nice Video !!! Please do more stone evaluations, it is so important to take the time to map out your cut with expensive rough.

[@evgenyk.4681]

Thank u for video.. Do u place the best color to the bottom of the pavilion? Or closer to the crown ? It is clear for me that inclusions are not good for culet, bcs of multiply the effect... How about the color?

[@gemstoneartist]

The answer isn't that simple. We are managing two things in corundum: Color zoning - or location within the rough, and also Pleochroism - or directional color. This exists because corundum splits the light into two rays, each with a different direction of polarization and energy (literally speed) inside the gem. We see the different rays according to the direction we're looking through the crystal. This sounds very sci-fi, or metaphysical, but it's real-world physics, and a key part of the technical part of producing this kind of outcome from the rough we started with. The answer to your question is that we consider and work with color direction and zoning (we had both in this piece), as well as rough shape, inclusions, etc - to decide what to put where to optimize the finished gem. I hope this is helpful.

[@evgenyk.4681]

@@gemstoneartist thank u for your reply