The birthstone of July, rubies were once inserted under the skin of Burmese warriors to grant them immortality.
Your prompt is RUBY.
A long incision
Slip the ruby under flesh
Ne’er again fear death
It was also thought their inner fire could boil water and melt wax.
Job 28:18 "The price of wisdom is above rubies"
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I threw rubies where they were gobbled
by bloodied mouths which still ask
through broken teeth: "Where is my wisdom?"
A stone for your soul:
Colour of life eternal
And cardinal sins