Accessibility options

Switch to preferred accessibility theme:


Increase or decrease the text size:

  • Internet Explorer: View > Text Size > Largest

Keyboard navigation and access keys:

  • A - Accessibility options
  • 0 - Skip navigation
  • 1 - Home
  • 2 - Alexandrite chapters
  • 3 - Alexandrite directory
  • 4 - Alexandrite forums
  • 5 - Alexandrite gemstones
  • 6 - Alexandrite localities
  • 7 - Contact information
  • 8 - About Alexandrite Guide
  • 9 - Sitemap
  • Press ALT + Access Key, then ENTER.

Close

Alexandrite

Tsarstone collectors guide

Zenhokyo

One of the most authoritative gemmological laboratory offering gemmological analysis using the latest equipment.

GAAJ-ZENHOKYO
Homepage Address Contact
www.gaaj-zenhokyo.co.jp/ 8F Daiwa-Ueno Bldg
5-25-11 Ueno
Tokyo 110-0005
Japan
N: Natsuki Takahashi
T: +81-3-3835-2466
F: +81-3-3839-0798
E: laboratory@gaaj-zenhokyo.co.jp

Leading gemmological educational institution in Japan has been providing professional education in the field for the past 30 years. Zenhokyo Laboratory is equipped with the most professional and advanced testing devices and systems, including inductively coupled plasma-mass spectrometers, laser tomography systems, laser induced breakdown spectrometry and the latest cathode luminescence equipment.

Page 4 of 14 Back to Top << >>
1 2 3 4 5 6 7 8 9 10 ... Last

This section has no relevant content published at this time.

Close options details