
Historical Reading List: Australian Opal

GIA Unveils The Jade Report
GIA, whose expertise spans gemological research, laboratory services and education, is introducing the GIA Jade Report, featuring additional gemological information and a sleek, user-friendly layout to enhance the overall report experience for both industry professionals and consumers.

理事會成員約翰‧威利(John W. Valley)博士榮休
加州卡爾斯巴德 ─ 2023年11月20日 ─ 自2014年起擔任GIA理事會成員的約翰‧W‧威利(John W. Valley)博士,11月初在加州卡爾斯巴德舉行的年度例會後正式退任。理事會及GIA管理層感激他在任期間作出重大貢獻,特別以其名字命名一項GIA獎學金,以表敬意。

Dr. John W. Valley Retires from GIA Board of Governors
Dr. John W. Valley, a member of the GIA Board of Governors since 2014, retired from the Board following their regular annual meeting held in early November in Carlsbad, CA.


Anna Martin to Retire from GIA
Anna Martin, GIA’s senior vice president of Institute and industry relations, will retire from GIA on December 31, 2023, after a very successful nine years with the Institute, 14 years on the GIA Board of Governors and more than 40 years as one of the most well-known and respected leaders in the gem and jewelry industry.

GIA Global Research Team Convenes in Carlsbad

GIA Global Research Team Convenes in Carlsbad
The more than 60 scientists, engineers, gemologists and technicians of GIA’s global research team met November 1-3 at the Institute’s world headquarters in Carlsbad, CA.


Chicago Responsible Jewelry Conference
A report on the seventh annual Chicago Responsible Jewelry Conference.

Translucent Ruby Filled with Zinc Glass
Examination of a heart-shaped ruby reveals a zinc glass filler.

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

Fissure with Moiré Pattern in Spinel
A precipitation of an unidentified mineral creates a complex moiré pattern in a fissure of a purple spinel.

Zigzag Fingerprint in Sri Lankan Sapphire
Fiber-optic illumination reveals rectilinear zigzag-patterned films with vibrant colors in a blue sapphire.

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

Heliodor with a Large Schorl Inclusion
An 8.33 ct rectangular heliodor displays two tourmaline inclusions and a thin band of fluids.

A Red Herring in a Red Garnet
Transparent crystal inclusions and gas bubbles are observed in a garnet-topped doublet.

Solid Laboratory-Grown Single-Crystal Diamond Ring
The quality and size of this 4.04 ct CVD-grown diamond ring demonstrate the advancing technology in laboratory-grown diamonds.

Blackish Green Omphacite Jade from Guatemala
A Guatemalan jade called yongchuliao has gained popularity among Chinese buyers.

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