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Geology/selection of gemstones' detector


Please tell me the best gemstones detector. I have been buying many detectors for metal and gold.
I'm really interested to find the best gemstones detector if there is any in the world.
best regards

Dear Mohammed Adab-Idi mubarak
You have to consult experts for detection evaluation of precious minerals-gem stones
Gemstones are not stones-minerals formed in nature-in geological -formations
In trade and commercial industry named as gemstones
I am geologist can identify few minerals and rocks-take expertise
You have to consult gemologists who can give value of gems including diamonds
I have given web sites to contact more information-
You can take training in gemological societies or training centers
u can see details of further in web
technical data and literature
Many experts are in the world who can identify evaluate commercial value of gold-diamond-gem stones
Read in further requires more -contact-us


ADDRESS    :    C/o Indian Institute of Gems & Jewellery
Bagmal Laxmichand Parikh Campus,Plot No. 111/2,
13th Road, MIDC, Andheri (East), Mumbai 400093
TELE    :    91-022 28263504 / 05
WORKING DAYS    :    Monday to Friday (Saturday Sunday: Closed)
TIMINGS         9.15 a.m. to 4.30 p.m.
Wikipedia web Source-
The Gemmological Institute of India (GII) is a non-profit school in Mumbai that conducts courses on gemmology. It was founded in April 1971 by the Gem and Jewellery Exporters' Association, Bombay. It offers diplomas for gemmology and diamond grading, and courses on jewellery design, pearls and bead stringing, diamond casting, and craftsman training. The school courses enable students to take the certification of Fellow of Gemmological Association (FGA) examination of the United Kingdom.

It publishes a quarterly publication called Indian Gemmologist. The GII is recognized by CIBJO which is an international confederation of jewellery trading industry that harmonizes standards set by gem testing laboratories.


The GII established India's first Gem Testing Laboratory in 1971, and started India's first Gemmology course in 1974. It started its Research and Development Laboratory in the field of gem stones in 1976, and its first Diamond Assorting and Grading Course in 1978. It started the first correspondence course in Gemmology in India in 1983, Jewellery Casting and Jewellery Designing courses in 1995.

The Gem Testing Laboratory was recognized by the International apex organization of Gem and Jewellery Trade, CIBJO. With increasing consumer awareness, the jewellery industry worldwide began to issue certifications to attest the quality of gem and diamond products. The GII started diamond certification in India in 2000. .[1]

In Nov 2004, during the 25th convocation, it was announced [2] that the Gem and Jewellery Export Promotion Council (GJEPC), Diamond Exporters' Association Ltd, Bharat Diamond Bourse and Gem and Jewellery Exporters' Association together with the Gemmological Institute of India will provide funds to set up a research centre in Mumbai, to carry out research and development activities especially for synthetic diamond and high pressure high temperature (HPHT) treated diamonds. The board was expanded to include eleven trustees, six from GJEPC, three from Gem and Jewellery Exporters' Association, one from Bharat Diamond Bourse and one from Diamond Exporters' Association Ltd.

In 2005, it was estimated that 5000 people have been trained in gemmology by GII since its inception. In October 2005, The GII acquired 4,500 square feet (420 m2) of premises at Sukh Sagar Building at the Opera House to expand its diamond grading laboratory Services. The new facility is called the National Research Centre.[3] In 2005, the department of scientific and industrial research of the central government of India, recognized the R&D Laboratory as a Scientific and Industrial Research Organization (SIRO).

In 2006, the GII tied up with Panjab University, Chandigarh as a research center for Ph.D. Studies in the field of gemstones and diamonds.

An issue the world's jewellery traders face is that synthetic diamonds which are cheaper and now very wide spread can be used to defraud consumers of natural diamonds. As synthetic diamond technology becomes more easily accessible it is necessary for consumers, customs, importers, exporters, and government to be sure of the grade and quality of the diamond or gemstone. Synthetic diamonds may be produced by high pressure high temperature (HTPT) method or chemical vapor deposition (CVD) method, which leave their signatures in the composition of the diamond. Research includes investigating techniques to look for these differences and distinguish natural gem stones from artificially produced ones.

   ^ News article from The Hindu Business Line, Apr 13th 2004, Setting standards
   ^ News article from The Hindu Business Line, Nov 2nd 2004, Gem institute, export bodies to set up research centre
   ^ News article from The Hindu Business Line, Oct 10th 2005, GII sets up centre for diamond research

External links

   Website of Gemmological Institute of India
   Information on the website of Gem and Jewellery export council
   Indian Gem and Jewellery Magazine, Solitaire, article April May 2006
   Blog on India's Diamond Industry(wikipedia source)


Dr D.Venkat Reddy
Professor of Geology
Editor- in -Chief -International  Journal of  Earth Sciences&Engineering -IJEE

Published by=(Cafet Innova Technical Society -CITS- Hyderabad-AP-India)
Department of Civil Engineering
National Institute of Technology,Karnataka,(NITK)



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Dr D.Venkat Reddy


Engineering Geology,Mining geology,commercial petrology,Decorative and dimensional stones,Hydrogeology


20years texhing and reserch expireience in geology,enginnering geology for graduate and undergraduate students-reserch guidance,10years field exoireience conducting field camps for geology students=Presently Assistant professor in geolog

NITK-National Institute of Technology,Surathkal,Mangalore-DK,India Geology section Dept of Civil Engineering

published 70 research papers.( 4 books)- Editor in Chief-International Journal of Earth Sciences and Engineering -1.Engineering Geology for civil Engineers-oxford &IBH pub-1996] 2.Decorative and dimensional stones of India-CBS Pub-1997 3.Engineering Geology-Vikaspublishers2010 4.Applied Geology-Vikaspub-2010

MSC(GEOLOGY),Osmania university,India, MSC(Tech )Hydrogeology,OU,India PhD(GEOLOGY)OU,India

Awards and Honors
Distinguishing Indian Award Editor in chief-International Journal of Earth Sciences and Engineering (

Past/Present Clients
PRESENTLY WORKING =Professor of Geology-Dept of Civil Engineering NITK-INDIA

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