This item is a chunk of raw labradorite stone that has been polished on one side. It weighs 2 pound 14.9 ounces or 1.33 kilograms with dimensions of approximately 4.5" long, 2.7" wide, and 4.3" tall (see photo with ruler).
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.