Gemological Science International (GSI)

Gemological Science International (GSI)

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Gemological Science International (GSI) is one of the world's largest gemological laboratories.

Based in the heart of New York City's Diamond District, GSI is an independent, professional gemological laboratory dedicated to developing innovative solutions to the challenges of gemstone identification and grading. There are 8 offices in the United States, India, Israel and Belgium, providing professional gemstone identification, grading and appraisal services to the fine jewelry industry. GSI

08/10/2026

Musician Carlos Santana, the award-winning Mexican-born guitarist and songwriter of the American rock band Santana, has launched a jewelry brand.

Santana Now was developed alongside LMN Creations, a jewelry consultancy founded by Noreen Paris, who held leadership roles at Tiffany & Co., David Yurman, and John Hardy.

Santana collaborated directly with Paris to create pieces of jewelry that translate his message of peace, unity, and spiritual connection into wearable and accessible designs.

Read More: https://tinyurl.com/54bn5t74

08/08/2026

Captivated by the energy of Belle Époque and the progress that led to the birth of cinema, Enrico Grassi Damiani created a truly iconic collection. Inspired by the frames of cinematographic film, the Belle Époque collection features circles and rectangles adorned with alternating diamonds, sapphires, rubies and emeralds, creating a sense of dynamism.

08/06/2026

The golden brown tiger's eye is usually a metamorphic rock and member of the quartz group. It is a chatoyant gemstone that has a silky, lustrous appearance. Chatoyancy is an optical phenomenon in which a band of reflected light is seen on the body of the gemstone. It is seen in certain gemstones, which include the tiger's eye. When light hits the surface of the gem, a wavy shimmer moves across the surface of the stone, resembling the eye of the tiger. A tiger's eye gemstone should be cut en cabochon to see the best results and the chatoyancy effect.

08/05/2026

Everything GSI does is shaped and supported by our four pillars:

INTEGRITY
All GSI gemological processes and reports are backed by a commitment to the highest ethical standards and practices.

INNOVATION
Because GSI utilizes leading-edge technologies and automated processes and software, we are able to offer uncompromising accuracy, reliability and consistency.

PROFESSIONAL SERVICE
Outstanding service is a mandate for GSI, focusing on providing unparalleled accessibility, accountability, and excellence.

RESEARCH & EDUCATION
GSI actively shares its knowledge with both trade and consumer audiences, leveraging industry relationships to promote learning, communication, and education programs.

Visit GemScience.net to learn more.

08/05/2026

While some months have only one birthstone, August has three. The August birthstones are peridot, spinel, and sardonyx. Sardonyx is the month’s original birthstone, found over 4,000 years ago. Here’s what you should know about these stunning stones and where to find the perfect gift for those born in August.

Read "August Birthstones: Peridot, Spinel, and Sardonyx" on InDepthWithDebbie.com at https://shorturl.at/OZfYr

08/04/2026

Movies are meant to entertain.They can also inspire, educate, transport viewers back to a moment in time, encourage dialog on important issues, and even drive fashion trends.

As movie-goers flood into cinemas around the country to watch "The Odyssey," the fashion selected by costume designer Ellen Mirojnick, is sparking a renewed fascination for Grecian and bronze aged jewelry.

Read More: https://tinyurl.com/v9dveaj7

08/04/2026

After several years of yellow gold dominating fine jewelry, sterling silver has made a major comeback—not as a replacement for gold, but as an equally important metal that feels modern, effortless, and versatile.

Read "Silver Linings: Why Sterling Is the Jewelry Trend Everyone's Talking About" on InDepthWithDebbie.com at https://shorturl.at/rY5KU

07/31/2026

The FRED Force 10 bracelet, created in 1966, is a signature unisex jewelry piece defined by its maritime-inspired braided nautical cable and iconic U-shaped marine shackle buckle. It features a fully interchangeable system where users can freely swap the buckle and strap.

Buckle Materials: Crafted in 18k yellow, white, or rose gold, black titanium, or steel, with options for plain, half-pavé, or full-pavé diamond and colored gemstone settings.

Cable and strap choices span traditional woven stainless steel, multi-row gold chains, or high-durability textile corderie cords in dozens of colors.

07/30/2026

If you love hues of pink and purple, sugilite will definitely fascinate you. A gemstone found in vibrant pink and purple color tones, the stone is named after its co-discoverer, Japanese petrologist Ken-ichi Sugi. The gemstone's color is a significant factor; hence, richer and deeper hues are more prized. Sugilite has a vitreous luster and is transparent, translucent, or opaque. Ranking around 5.5-6.5 on the Mohs scale, it is a relatively softer gemstone and is mainly cut en cabochon, and in carvings and beads.

07/29/2026

“The regions where diamonds are mined and polished rely on the economic stability the diamond industry offers in addition to the jobs, healthcare, clean water, and education it helps provide. We believe in giving back to all the communities where we operate our laboratories by providing things like education, jobs, and charitable initiatives. When it comes to transparency and ethical sourcing, I believe our industry is ahead of many others,” says Debbie Azar, President and Co-Founder of Gemological Science International (GSI).

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Location

Category

Telephone

Address


581 5th Avenue, Fl 4th
New York, NY
10017

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm