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Stage 1 of 3
adamas
Greek · ancient
"unconquerable, invincible"
literally unconquerable, describing the hardest known substance
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Stage 2 of 3
diamant
Old French · medieval
"a hard, precious clear gemstone"
carried through Latin into French gemstone vocabulary
3
Stage 3 of 3
diamond
English · 1300s
"a hard, precious clear gemstone"
settled as the English word for the precious clear gemstone
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