Peridot is the gem variety of forsterite/olivine. In many ancient uses, it was confused with emerald. It is a classic birthstone for August and it's easy to see why this stone is popular in jewelry - it is wearable and has a bright, happy color. Many peridots aren't cut well or show a bright, highly saturated color. This elongated brilliant cushion cut is a welcome exception to the norm in that it has great color, even saturation, and it is a very bright stone for the species. The size is also quite respectable as this is older material an dharder to come by today than it once was.