Examines a technique for setting cut garnets on glass objects, invented by Claudius vom Creutz of Nuremberg in the late sixteenth century.

Fiber-optic illumination reveals rectilinear zigzag-patterned films with vibrant colors in a blue sapphire.

Explores eclogitic diamonds, which make up a significant portion of the gem diamond market, and what they reveal about Earth’s dynamic processes.

Trigons and tetragons observed in a chameleon diamond indicate both octahedral and cubic growth.

Details the colors and optical effects caused by metallic copper inclusions in this gem-quality feldspar.

Investigates the various chromophores responsible for color in four types of yellow sapphire.

A report on the seventh annual Chicago Responsible Jewelry Conference.

A Guatemalan jade called yongchuliao has gained popularity among Chinese buyers.

Reports on the geological setting and gemological properties of violet-blue gem cordierite from new deposits located in British Columbia.