Laboratories in Japan

Jewel Trading Laboratory:
Address:
Sasuga Daini Bldg. 4F
5-21-3 Ueno, Taito-ku, Tokyo
Japan
Tel: 03-3835-0607
Fax: 03-3835-0693
Owner:
Limited Corporation Shorei Murayama.
Specialization:
Diamond grading and gem identification.
Special Equipment:
Diamension Recording Spectrophotometer.
Services Offered:
Issuance of diamond Grading Report, Sorting
Memo, and Gem Identification Report.
Certificate/Report:
AGL standards are used in both diamond
grading and gem identification.
KGL Kokuhoren:
Address:
4-29-13 Taito, Taito-ku, Tokyo
Japan
Tel: 03-3833-5331
Fax: 03-5818-7058
Owner:
Private Corporation Tadaaki Saito, President.
Specialization:
Diamond grading and gem identification.
Special Equipment:
General equipment.
Services Offered:
Issuance of Diamond Grading Report (including
sorting memo) and gem Identification Report.
Certificate/Report:
On diamond grading report: Color, clarity, cut
grade. On colored stone report: Gem identification
only.
Kokuhoren International Gem Appraisers Inc:
Address:
Kokusai Hoseki Kaikan 2nd Fl.
1-12-6 Ueno, Taito-ku
Tokyo 110-0005, Japan
Tel: 03-3836-0546
Fax: 03-3832-5072
Owner:
Private Corporation Jiro Takikawa, President.
Specialization:
Diamond grading and gem isentification.
Special Equipment:
Diamension, and other equipment necessary to grade
diamonds and identify gems.
Services Offered:
Diamond grading and gem identification.
Certificate/Report:
GIA standards are used in both diamond grading and gem
identification.

 

Tokyo Gem Science Academy:
Address:
Kojima Bldg. 3-20-8, Taito-ku
Tokyo Japan
Tel: 03-3826-5838
Fax: 03-3836-5837
Owner:
Private Corporation Keiko Kon, President.
Specialization:
Color stone identification, diamond grading,pearl
identification.
Special Equipment:
UV Visible Recording Spectrophotometer, Fourier
Transform Infrared Spectrophotometer.
Services Offered:
Gem Identification (including Pearl Report).
Diamond Grading Report, private classes on
gemology, distributing information to trade
magazines.
Certificate/Report:
As described in AGL rules; AGL rules out descri-
ption of origin.
Educactional Programs:
Private classes are held, but certification program
is not provided.








Universal Gem Laboratory:
Address:
Dai-2 Orient Bldg. 7th Floor
5-13-11 Ueno, Taito-ku
Tokyo Japan
Tel: 03-3836-2315
Fax: 03-3831-2136
Owner:
Private Corporation Masahiro Yamada, President.
Specialization:
Diamond grading and gem identification.
Services Offered:
Gem identification and diamond grading, seminars
offered.
Certificate/Report:
Color, clarity scale, cut grade for diamonds.
Origins, enhancement identification for color stones.
















Zenhokyo Gemmological Association of
all Japan:

Address:
Tokyo Biho Kaikan Bldg.
1-24 Akashicho, Chuo-ku
Tokyo 104-0044 Japan
Tel: 03-3543-3821
Fax: 03-3543-3618
Locations: Osaka Branch: Chuo-ku, Osaka;
Fukuoka Branch: Hakata-ku, Fukuoka;
Israel Zenhokyo: Ramat Gan, Israel
Owner:
Private Corporation Eiichi Tsuruoka, President.
Specialization:
Gemology, diamond grading, gem identification.
Special Equipment:
X-ray Fluorescence, Cathode Luminescence, UV
Visible Recording Spectrophotometer, Laser To-
mography, Infrared Spectrophotometer.
Services Offered:
Issuance of Diaomond Grading Report (including
sorting memo) and Gem Identification Report.
Gemology Program.
Certificate/Report:
Gem Identification Report describes all the test
results including enhancement. Diamond Grading
Report describes all the test results.
Educactional Programs:
Based on an agreement with the Gemmoligical
Association of Great Britain, GAAJ provides FGA
(Fellow of Gemmological Association of Great
Britain) education programs in Japanese. Apart
from the FGA program, GAAJ provides CGJ
(Certified Gemologist of Japan.)

WTS.
Email: info@colorstones.com