This pendant has auroras on the front and a secret compartment inside. On Aug. 30th, the students of Earth to Sky Calculus launched it to the stratosphere onboard a cosmic ray research balloon. At the apex of the flight, it floated 98,659 feet above the Sierra Nevada mountains of central California. 
 
The heart-shaped stainless steel frame measures 0.9 x 1.6 inches. The inner chamber has space for ashes, dried flowers, essential oils, special messages  -- or anything you wish to keep close to your heart.
 
During the 2.3 hour flight, the pendant experienced temperatures as low as -60 C and air pressures less than 0.11% of sea level. According to onboard radiation sensors, cosmic ray levels were 100 times Earth-normal as the pendant reached the top of our planet’s atmosphere and touched the edge of space. After the balloon exploded, the payload parachuted back to Earth, landing on Coyote Flats in the Sierra Nevada wilderness.
 
The students are selling space pendants to pay the helium bill for their cosmic ray ballooning program. Each one comes with a greeting card showing the jewelry in flight and telling the story of its trip to the stratosphere and back again.