CARLSBAD, Calif. – Feb. 23, 2021 – Recently, GIA (Gemological Institute of America) encountered a number of stones that were submitted for updated reports or verification services that did not match the GIA report submitted with them. The newly-submitted stones were either laboratory-grown diamonds or treated natural diamonds, falsely inscribed with GIA report numbers.

CARLSBAD, Calif. – Feb. 3, 2021 – Whether you are new to the gem and jewelry industry or a veteran looking to expand your knowledge, education from GIA will equip you with the tools to succeed. A scholarship from GIA makes achieving your educational goals financially attainable.

An overview of the Fall 2020 Gems & Gemology content.

Dendritic inclusions in a pinkish-purple sapphire are revealed with fiber-optic lighting.

“Star cruisers” formed of ferrocolumbite seem to fly in a large topaz crystal from the Shigar Valley in Pakistan.

Chronicles important auctions of jewels from European royal collections over the years, with a focus on a recent high-profile sale of items that once belonged to Marie Antoinette.

Presents spectroscopic and chemical analysis of a new variety of turquoise with a rare raindrop pattern with saturated colors.

Examines a very large dataset of colorless to near-colorless diamonds submitted to GIA and evaluates their diamond type and spectroscopic properties.

Presents a detailed study of gemological properties, inclusion features, spectroscopic characteristics, and chemical composition of emeralds from this important source.

Magnetite inclusions in a four-rayed star peridot help to date its terrestrial age.

A 60.71 ct cabochon was recently submitted to the Tokyo lab for identification.

A large natural pearl discovered in an edible oyster offers insight to the scientific pearl community.

GIA Johannesburg identifies fraudulent GIA inscriptions on several synthetic moissanites submitted as diamonds.

Dramatic color-fluorescing areas in a sword-shaped diamond give rise to the nickname “Fire and Ice.”

Reports on a visit to a shell nucleus manufacturer and two pearl farms in northern Vietnam, which is emerging as a notable producer.

The Carlsbad laboratory received for examination two dark-colored bead cultured pearls embedded with an electronic device from Jeremy Shepherd, CEO of Pearl Paradise.

An emerald from the Swat Valley manifests its growth in three distinct steps, identifying it as “trapiche-type.”

CARLSBAD, Calif. – Jan. 21, 2021 – Register for GIA’s Knowledge Rocks Week: Spring Into Color for four days of exciting virtual events taking you deep into the beautiful world of colored stones.

ニューヨークのGIAラボラトリーは先日、素晴らしい真珠を検査する機会を得て、さらに素敵な話も聞くことができました。

Annotated reading lists compiled on Lazurite (Lapis Lazuli) from Afghanistan and its Artistic Use as a Blue Pigment (Ultramarine)