Pink ChalcedonyA pink chalcedony shows off its beauty. Chalcedonies include many types of cryptocrystalline quartz gems and feature a number of different colors. Geologists can tell a chalcedony ...

Naomi Sarna has been working on a grapefruit-size sculpture of a Siamese fighting fish, coaxing it from a piece of blue ...

The South African government says that stones found in a village last month are not diamonds but quartz. A cattle herder first uncovered the stones in KwaZulu-Natal province. It prompted thousands ...