These are lab created light gray laser garnet facet rough. Pieces are labeled with their gram weight and letter in the photo and they can be purchased individually.
This is a new type of YAG (yttrium aluminum garnet) that we recently got in. It has an unusual grey color which is only found at the tips of some crystals thanks to an unknown impurity or growth defect. The color tends to be a pure blueish-grey color at the tip fading into a purple grey at the base. It cuts a very bright and beautiful stone which resembles the coveted natural grey spinels.
YAG is an excellent material to facet, incredibly easy to cut and polish and with a high hardness of 8.25-8.5, an RI of 1.83 and good dispersion which makes for very lively stones even before the color factors in. It is suitable for use in all kinds of jewelry.
