Frequently Asked Questions
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General Questions
Basic information about our services and processes
12 QuestionsCertification Process
Questions about how certification works
15 QuestionsPricing & Payment
Information about costs and payment methods
8 QuestionsTechnical Questions
Detailed technical information about testing
20 QuestionsAll Questions & Answers
General Questions
GCI (Gemstone Certification Institute) is a premier gemological laboratory that provides professional gemstone certification, jewelry authentication, and diamond screening services. We offer comprehensive testing using advanced equipment and expert gemologists to ensure accurate identification and quality assessment of precious and semi-precious gemstones.
GCI has been providing professional gemstone certification services since 2009. With over 15 years of experience, we have built a reputation for excellence and reliability in the global jewelry industry.
Our laboratory is located at F-32-33, Flatted Factory Complex, Jhandewalan, New Delhi 110055, India. We serve clients both locally and internationally through secure shipping services.
Yes, we accept clients from around the world. We provide secure shipping instructions and handle all necessary documentation for international shipments. Our certificates are internationally recognized and accepted by major jewelry associations worldwide.
Certification Process
Standard certification takes 3-5 business days from the time we receive your gemstone. Rush services are available for urgent requirements with 24-48 hour turnaround for an additional fee.
Our certificates include detailed gemological data such as species identification, color grading, clarity assessment, cut quality evaluation, carat weight, measurements, treatment detection, origin information, and security features including QR code for online verification.
We offer two types of certificates: A4 size certificates on high-quality laminated paper for detailed information, and compact PVC ID card size certificates for easy carrying. Both include the same comprehensive gemological data and security features.
You can verify your certificate by visiting our verification page and entering your certificate number, or by scanning the QR code on your certificate. This provides instant access to your certificate details and confirms its authenticity.
Pricing & Payment
Our prices are determined based on the type of gemstone, size, complexity of testing required, and the level of detail needed in the certificate. Larger and more complex gemstones require more extensive testing, which is reflected in the pricing.
We accept cash, bank transfers, credit/debit cards, and all major digital payment methods including UPI, Paytm, Google Pay, and PhonePe. Corporate clients can also arrange credit terms.
Yes, we offer special pricing for bulk orders. Contact us directly to discuss volume discounts for orders of 10 or more certificates. We also provide corporate rates for regular clients.
No, we believe in transparent pricing. All charges are clearly stated upfront. The only additional costs are for optional services like rush processing, PVC certificates, or express shipping.
Technical Questions
We use state-of-the-art equipment including gemological microscopes, FTIR spectrometers, precision scales, UV light sources, refractometers, and other advanced testing instruments. Our laboratory is equipped with the latest technology for accurate gemstone analysis.
Yes, our advanced testing equipment and expert gemologists can detect synthetic gemstones, including lab-grown diamonds and other synthetic materials. We use multiple testing methods to ensure accurate identification.
We use various testing methods including microscopic examination, spectroscopic analysis, and specialized equipment to detect treatments such as heating, irradiation, filling, and coating. All treatments are clearly documented in the certificate.
We provide a 100% accuracy guarantee on all our certifications. If there is any dispute about our findings, we offer free re-testing. Our certificates are backed by our reputation and insurance coverage for your peace of mind.
Still have questions?
Our expert team is here to help you with any questions about gemstone certification, testing processes, or our services.