You can buy the Raviratna, world's largest star ruby cut like a cabochon on top, for a billion US dollars. Or it's smaller cousin, the Rajarathna, the largest star stone in the world, weighing ...

"The Estrela de Fura", meaning "Star of Fura", was cut from a 101-carat rough stone and is the world's largest ruby The biggest ruby ever to come to auction has been sold in New York for a record ...

Gemfields Group said on Tuesday disruptions were possible at its largest ruby mine in Mozambique, after people torched ...

The Montepuez ruby mine in the north-east of Mozambique boasts the largest ruby asset globally and is currently valued at around $1bn. It produces some of the oldest rubies in the world ...

The Montepuez ruby mine in the north-east of Mozambique boasts the largest ruby asset globally and is currently valued at around $1bn. It produces some of the oldest rubies in the world ...

A chemical process allows a full-size gemstone to be grown from a tiny fragment A university lecturer has successfully grown a full-size ruby as it ... is believed to be a world-first process.