"The bright pieces have a half life of 12.38 years."
So said my son as he handed me this necklace.
His gift to me was quite a production--the final piece just came today. He designed the heart and had it made on a 3-D printer. The diagonal lines contain bright yellow vials of tritium.
I'll wear it proudly, as soon as the vinegar scent of superglue wears off.
In the meantime, it's quite easy to find in the dark.
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