Responsible for many windowed alexandrite is often a combination of the crystalshape, the pleochroism and of course the price of the rough. Not an easy job for the cutter!
Look at the long cushion Yvonne offers. The table is vertical to the b-axis and in this direction you have the best daylight color. a-axis is vertical to the long side and would show the best incandescent light color, c-axis vertical to the short side.
These long ovals, pears or cushions are often single crystals or V shaped twins. And the are often very flat. Unfortunately!
Look at the long cushion Yvonne offers. The table is vertical to the b-axis and in this direction you have the best daylight color. a-axis is vertical to the long side and would show the best incandescent light color, c-axis vertical to the short side.
These long ovals, pears or cushions are often single crystals or V shaped twins. And the are often very flat. Unfortunately!