Question

in olden days for colouring from where the purple colour was obtained​

Answer 1

For centuries, the purple dye trade was centered in the ancient Phoenician city of Tyre in modern day Lebanon. The Phoenicians' “Tyrian purple” came from a species of sea snail now known as Bolinus brandaris, and it was so exceedingly rare that it became worth its weight in gold.

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Answer 2

Snippet content

By boiling them in lead vats, purple dye was extracted from snails to make Tyrian purple. In ancient Rome, purple was the color of royalty, a designator of status. And while purple is flashy and pretty, it was more important at the time that purple was expensive. ... The snails, though, aren't purple to begin with.