This item is a chunk of raw labradorite stone that has been polished on one side. It weighs 2 pound 12 ounces or 1.248 kilograms with dimensions of approximately 4.4" long, 2.4" wide, and 9.0" tall (see photo with ruler). This item is a little unstable when standing up, so it would be best if it wasn't used as a bookend.
Labradorite is a popular decorative stone because of its labradorescence, which creates a dazzling optical phenomenon of a blue green to deep blue sheen that shimmers in the light. Other varieties, including rare specimens, offer a stunning rainbow of green, violet, or orange shimmer called spectrolite.