เปิดทำการกี่โมง?

จันทร์ 09:30 - 17:00 อังคาร 09:30 - 17:00 พุธ 09:30 - 17:00 พฤหัสบดี 09:30 - 17:00 ศุกร์ 09:30 - 17:00

Tokyo Gem Laboratory - TGL

Established in 1989, Tokyo Gem Laboratory is a trusted authority in gemstone identification, origin determination, certification, and diamond testing.

With decades of expertise, we uphold the highest standards of accuracy and reliability.

31/12/2025

25/12/2025

🎄 Merry Christmas to all! Hope your day is full of happiness, laughter, and good memories 🎁✨ 🎅

15/12/2025

Welcome from Tokyo Gem Laboratory

15/12/2025

Welcome from Tokyo Gem Laboratory.

01/12/2025

Isolated garnet inclusion in sapphire — its dodecahedral form and lack of fissure connection suggest early-stage crystallization. Garnet is a common inclusion in metamorphic sapphires, notably from Sri Lanka and Madagascar.

25/11/2025

Your satisfactory services

24/11/2025

21/11/2025

Test Now At Tokyo Gem Lab.

18/11/2025

Today, our lab encountered a synthetic sapphire with some interesting and less-common features.

Under the spectroscope, the stone showed an iron (Fe) absorption band, which can appear in Fe-rich synthetic sapphires even though many synthetics typically show weaker Fe features.

Under short-wave UV, the stone was inert, whereas many Verneuil synthetics usually display a chalky blue fluorescence. The lack of reaction is consistent with higher iron content, which suppresses UV fluorescence.

Each gemstone has its own story, and our job is to reveal it with precise analysis and transparent reporting.

💎 If you need your stones tested, feel free to contact us.