Along the shores of this river, agate was discovered by Theophrastus. Later, Achates was translated into English language and hence the stone name became agate. As a stone, blue agate has been there for thousands of years. The earliest uses of blue agate gemstones in recorded history are traced back to about 3000 years. https://www.sagaciajewelry.com/blogs/news/blue-agate-history-meaning-healing-properties-benefits