It's the first pearl in the stratosphere. On Aug. 19, 2019, the students of Earth to Sky Calculus launched a cosmic ray balloon to the edge of space. This sterling silver pearl necklace went along for the trip. The balloon flew 104,002 ft above the Sierra Nevada mountains of central California, experiencing temperatures as low as -63 C and cosmic ray fluxes 200x stronger than on the Earth below. After the helium balloon exploded (as planned), the payload parachuted back to Earth, landing in the volcanic tablelands north of Bishop, California. The students got great cosmic ray data, and the pearl had a wild ride.
Each pendant comes with a greeting card showing the jewelry in flight and telling the story of its journey to the edge of space. Sales of this pendant support the Earth to Sky Calculus cosmic ray ballooning program and hands-on STEM research.