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Stage 1 of 3
Obsius
Latin · ancient
"a person's name"
the name of a Roman who, per Pliny, discovered a similar dark volcanic stone in Ethiopia
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Stage 2 of 3
obsidianus
Latin · ancient
"the dark, glassy volcanic stone"
named after Obsius for the dark, glassy volcanic stone
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Stage 3 of 3
obsidian
English · 1600s
"a dark, glassy volcanic rock"
settled as the English word for the naturally occurring volcanic glass
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