Experts say the pigment was worth more than gold and used to dye the clothes of imperial figures.
A rare dye made from snails for the robes of the Roman elite almost 2,000 years ago has been unearthed at a cricket club.
The chunk of Tyrian purple, roughly the size of a ping pong ball, was dug up at Carlisle Cricket Club as part of ongoing yearly excavations.
A Roman bathhouse was discovered at the site in 2017 and in the last three years 2,000 items including pottery, weapons, coins and semi-precious stones have been found.
What's a semi precious stone? I've read the article and seen the pictures, but still don't know. Is it stones that are pretty but with little monetary value?