This item is a stunning spring green prehnite specimen. The approximate dimensions are 2.2 inches long, 1.5 inches wide, and 1.3 inches tall (see photo with ruler). It weights 1.8 ounces or 52 grams. #7
Prehnite is a mineral composed of calcium and aluminum. Its color varies usually from light green to yellow, but can also be colorless, blue, pink, orange, and white.