Prasiolite is quartz in cool leek-green — a serene, glassy hue quite unlike any other green gem’s. Naturally green crystals are genuinely rare finds; hardness 7 makes it a dependable jewelry stone with an unusual story.When prasiolite is available at GEMIC Institute it is natural, certified by our gemologists and filmed as the exact stone for sale. One of a kind; tracked shipping worldwide, 30-day return period.