Now, excavations at the site have revealed ancient structures — and a “unique” carved stone. “The majority of the approximately 30 excavated or partially investigated earl ...

Nephrite, an aggregate rock made mostly of tremolite ... Earlier this month in Tucson, Ariz., during the annual gem shows in that Sonoran Desert city, the buzz among jade lovers centered on ...

Nephrite is the second ... recent achievements have included growing jewellery-quality gems from a “ruby seed”, and even creating glow-in-the-dark crystals.