Find this orientation by looking through the crystal at the sky at a time when you can see the sun, mark the sun's direction on the crystal, and your mark will always point towards the sun when you match the beams from even a tiny patch of blue in an otherwise overcast sky.

ECONOMIST: How Norsemen found their way round in cloudy weather

My lunch companion and I raised our glass to friendship, to France, even to hard work, and finally to the singular beauty of a crystal flute of Champagne glowing from afternoon sun that poured through the window.

BBC: Travelling solo in the world��s most romantic country

The team from France say the transparent crystal may have been used to locate the Sun even on cloudy days.

BBC: 'Viking sunstone' found in shipwreck

The company had a well-developed portfolio of beverages for kids, including Kool-Aid and Capri Sun, and it had a great portfolio of products for women, Crystal Light and Maxwell House, being among the most popular.

FORBES: What Does Creativity Look Like in Branding These Days? Three Marketing Pros Weigh In.

The storied crystal is claimed to have been able to accurately map the location of the sun -- even in cloudy sky -- within 5 degrees.

ENGADGET: Alt-week 3.9.13: Sunstones, knotted vortices and a zero-g robot