Independently Certified.
Documented Anywhere in the World
Every specimen we sell is curated to be natural and untreated, with any repair or treatment fully disclosed. Where a piece warrants it, we arrange internationally recognised certification through minID (敏德礦研) — the certification service and laboratory formed by TCGL in partnership with mindat.org — giving your specimen a permanent, independently verifiable record that follows it anywhere in the world.
minID Laboratory
We arrange internationally recognised gemological certification through our exclusive partner, minID (敏德礦研) — the certification service and laboratory formed by TCGL in partnership with mindat.org. All certifications are conducted and issued by Dr Franco Lui and Dr Anne Huang, using analytical equipment typically found only in university and research laboratories.
www.tcgl-lab.com →
Issued through mindat.org and independently verifiable, each certificate carries genuine weight with collectors, dealers, and institutions worldwide.
Your specimen's record lives online and is accessible from anywhere via QR code. There is no risk of loss, damage, or dispute — the record exists entirely independently of the physical card.
Every certificate is tied to professionally taken photographs of the specific specimen, making misattribution impossible. Each piece is uniquely and permanently identifiable.
Certificates are issued in both Chinese and English, enabling your specimen to be documented and traded across two of the world's most significant collector markets.
Each Level 1 certificate includes a physical card with QR code, precise specimen identification details, and permanent online access to your specimen's record on mindat.org.
Level 2 builds on Standard Certification with an additional layer of hands-on laboratory analysis — including testing for treatment or enhancement, so the specimen is independently confirmed as natural and untreated. Each card carries the official minID laboratory stamp, reflecting direct assessment and sign-off by the lab — the highest level of confidence for significant or rare specimens.
Any Piece — Ours or Yours
Certification is available for any specimen, regardless of where it was purchased. It begins with a consultation at the gallery — from there, we manage the laboratory logistics end to end.
Bring your specimen to the gallery. We make a cursory check, confirm the details, and advise on the logistics — a short consultation before anything is committed. Message us on WhatsApp to arrange it.
We ship or hand-carry the piece to the minID laboratory — whichever we agreed at the consultation — and keep you informed at every stage of the journey.
The specimen is examined and certified at the laboratory, and the card is shipped back to Singapore together with your piece.
Collect your certified specimen at the gallery, or have delivery arranged for a fee.
Common Questions
Gemological certification provides an independent, documented assessment of your specimen — confirming its identity, origin details, and authenticity. It gives collectors genuine peace of mind, and is particularly important for pieces whose provenance is uncertain or unknown. A certified specimen is also significantly easier to resell, insure, or pass on as part of a collection.
Level 1 records what a specimen is and where it is from, with a permanent, verifiable online record. Level 2 adds direct laboratory analysis of each individual piece — including testing for treatment or enhancement, independently confirming the specimen is natural and untreated. Unlike many local testing facilities, minID employs analytical equipment typically found only in university and research laboratories — providing a level of scientific rigour that is exceptionally rare in the region, and carrying corresponding weight with discerning collectors and institutions.
Yes. Certification through minID is available for any specimen, regardless of where it was purchased. Simply reach out to us via WhatsApp at +65 9833 3269 to arrange an assessment.
Certification requires a minimum of one month, primarily due to international shipping times to and from the laboratory. Specimens that are more complex or require additional testing may take longer. We will keep you informed throughout the process.
Every specimen in our collection is carefully curated to ensure it is natural and untreated, and any repairs or treatments are fully disclosed before purchase. For added assurance, we offer refunds on pieces that are certified as otherwise by our designated gemological partners.
Yes. Certificates are issued through mindat.org and are independently verifiable, carrying weight with collectors, dealers, and institutions worldwide. Each record is bilingual — issued in both Chinese and English — so your specimen can be documented and traded across two of the world's most significant collector markets.
Certify a Specimen
Whether it is a piece from our gallery or one already in your collection, we are happy to advise on whether certification is worthwhile — and to arrange it end to end.