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One advantage for our company, Heraeus, was that the fused quartz we manufactured was known to have the highest purity, making it resistant to any radiation ionization that would make normal glass darken while aging in outer space.

Lucky strike … A fulgurite of fused quartz, collected in Florida.

His most recent work was done with a potassium cell with walls of fused quartz, perfected after many trial attempts.

Finally launched in 2004, it carried four gyroscopes--made up of fused quartz balls coated with superconducting niobium that rotated up to 5,000 times per minute.

It is made of fused quartz which is resistant to the influence of temperature change and to the earth’s magnetism.