A recap of the second annual Turquoise United Conference.

A report on the seventh annual Chicago Responsible Jewelry Conference.

Examination of a heart-shaped ruby reveals a zinc glass filler.

A greenish blue spinel displays a large network of needle-like dislocations clustered in a six-rayed star pattern.

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

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

Blade-like magnetite inclusions developed from a healed fracture in peridot resemble a dark, rainy afternoon in a lakeside city.

An 8.33 ct rectangular heliodor displays two tourmaline inclusions and a thin band of fluids.

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

Transparent crystal inclusions and gas bubbles are observed in a garnet-topped doublet.

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

Zigzag lines are observed only with oblique light in a 55 ct aquamarine.

An etch channel in the crown facets of a diamond resembles a mace-like weapon.

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

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

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

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.

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

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

An overview of the Fall 2023 Gems & Gemology content.