Labradorite, a rock that consists of aluminum, calcium, and sodium silicates. It is a variety of feldspar, found in dark gray crystalline masses that are easily split into slabs. Some varieties of labradorite are beautiful when polished, showing rich shades of blue, green, and bronze. Labradorite is used for table tops and for small ornamental objects. It is found in parts of Europe and the United States, but the finest grade occurs in Labrador.
A famous slogan claims that a diamond is forever. While these precious stones symbolize love and glamour for millions of couples, there's a lot about nature's most famous jewel you might not know.
The world of our far-future descendants may be as unrecognizable to us as our bustling, urbanized world would be to our bewildered ancient forefathers. Will energy drive many of those changes?