It is nice to finish a smaller standard round brilliant of 1.75 carats without having anything to pull my hair out for. The stone is probably rich in manganese of different valence states and high manganese can lead to a fast polish if your not too bother by a little undercutting. The most unusual thing about this gemstone is the color dynamics that are set up by orienting the table parallel to the principle axis.
With this configuration you can easily see slightly purplish pink sectors and yellowish orange brown sectors. The amount of each changes significantly with the quality of the white light used for illumination. Sometimes the entire center of the stone is the orangish color (that can appear more or less brown) and only a few edge sectors of the pink, while under other white lights the stone appears mostly pink (that can appear with more or less purple). This is what I call a dynamic color arrangement brought to you by a dichroic gemstone with unstable colors of approximately the tonal values (medium).
And when you live with this modest gemstone for awhile you know it has to be a tourmaline.
Bruce
Picture to follow.
