Gemstone: Helenite - Fused Volcanic Ash From Mt. Saint Helen's, WA Stone Cut: Long Pear Brilliant-Cut Stone Size: 1.8ct - 14mm x 6mm Metal: 925 Sterling Silver Color: Lavender Purple Setting: Prong Origin: Washington, USA *Because we use natural stones, the stones may vary slightly in shape, size, and color. * About Helenite: Helenite is a gemstone that resulted from volcanic ash and rocks, and is also referred to as emerald obsidianite, Mount St. Helen obsidian. The volcano erupted on May 18, 1980, and ejected igneous rock from 10-20 miles underground. The fury of the volcanic eruption is a wondrous occurrence in nature.