Inquiries

The laboratory is open
for consultation.

Connect with our gemologists for grading submissions, appraisal services, and technical gemstone analysis.

Contact Details

General Inquiries

info@gsl-inc.com

Telephone

+1 (212) 555-0198

Laboratory Hours

Monday — Friday 9:00 AM – 5:00 PM Saturday Closed Sunday Closed

Physical Submissions

Gemological Science International
Laboratory Office
New York, NY 10036

Security & Care

Every stone submitted to GSL is handled with clinical precision. Our facility maintains strict security protocols and climate-controlled environments to ensure the integrity of your assets during the grading process.

Ready to submit a diamond?

For bulk certifications or institutional partnerships, please request a formal consultation through the form above.