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

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

Examines dissolution features of heliodor and green beryl from a Ukrainian pegmatite field and offers criteria to distinguish them from samples found in other localities.

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

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

A precipitation of an unidentified mineral creates a complex moiré pattern in a fissure of a purple spinel.

The quality and size of this 4.04 ct CVD-grown diamond ring demonstrate the advancing technology in laboratory-grown diamonds.

A report on the seventh annual Chicago Responsible Jewelry Conference.

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

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.