minimum 3.75ct 12x10mm oval russian lab alexandrite. this man-made color change gemstone changes from bluish green in daylight to purplish red in incandescent light. it has essentially the same chemical composition and crystal structure as natural alexandrite.
minimum 5.50ct 12x10mm oval russian lab alexandrite. this man-made color change gemstone changes from bluish green in daylight to purplish red in incandescent light. it has essentially the same chemical composition and crystal structure as natural alexandrite.
minimum 4.50ct 12x10mm oval russian lab alexandrite. this man-made color change gemstone changes from bluish green in daylight to purplish red in incandescent light. it has essentially the same chemical composition and crystal structure as natural alexandrite.