Tell Us More

Share a bit more information with us
to finalize your Free Quote request.

You are looking for information regarding:

2 to 10+ carat
Round Diamond
Country
United States Afghanistan Aland Islands Albania Algeria American Samoa Andorra Angola Anguilla Antarctica Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia, Plurinational State of Bonaire, Sint Eustatius and Saba Bosnia and Herzegovina Botswana Bouvet Island Brazil British Indian Ocean Territory Brunei Darussalam Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Cape Verde Cayman Islands Central African Republic Chad Chile China Chinese Taipei Christmas Island Cocos (Keeling) Islands Colombia Comoros Congo Congo, the Democratic Republic of the Cook Islands Costa Rica Cote d'Ivoire Croatia Cuba Curaçao Cyprus Czech Republic Denmark Djibouti Dominica Dominican Republic East Timor Ecuador Egypt El Salvador Equatorial Guinea Eritrea Estonia Ethiopia Falkland Islands (Malvinas) Faroe Islands Fiji Finland France French Guiana French Polynesia French Southern Territories Gabon Gambia Georgia Germany Ghana Gibraltar Greece Greenland Grenada Guadeloupe Guam Guatemala Guernsey Guinea Guinea-Bissau Guyana Haiti Heard Island and McDonald Islands Holy See (Vatican City State) Honduras Hong Kong Hungary Iceland India Indonesia Iran Iran, Islamic Republic of Iraq Ireland Isle of Man Israel Italy Jamaica Japan Jersey Jordan Kazakhstan Kenya Kiribati Korea Korea, Democratic People's Republic of Korea, Republic of Korea (South) Kuwait Kyrgyzstan Lao People's Democratic Republic Laos Latvia Lebanon Lesotho Liberia Libyan Arab Jamahiriya Liechtenstein Lithuania Luxembourg Macao Macedonia, the former Yugoslav Republic of Madagascar Malawi Malaysia Maldives Mali Malta Marshall Islands Martinique Mauritania Mauritius Mayotte Mexico Moldova, Republic of Monaco Mongolia Montenegro Montserrat Morocco Mozambique Myanmar Namibia Nauru Nepal Netherlands Netherlands Antilles New Caledonia New Zealand Nicaragua Niger Nigeria Niue Norfolk Island Northern Mariana Islands Norway Oman Pakistan Palestinian Territory, Occupied Panama Papua New Guinea Paraguay Peru Philippines Pitcairn Poland Portugal Puerto Rico Qatar Republic of China Reunion Romania Russian Federation Rwanda Saint Barthélemy Saint Helena, Ascension and Tristan da Cunha Saint Kitts and Nevis Saint Lucia Saint Martin (French part) Saint Pierre and Miquelon Saint Vincent and the Grenadines Samoa San Marino Sao Tome and Principe Saudi Arabia Senegal Serbia Serbia and Montenegro Seychelles Sierra Leone Singapore Sint Maarten (Dutch part) Slovakia Slovenia Solomon Islands Somalia South Africa South Georgia and the South Sandwich Islands South Sudan Spain Sri Lanka Sudan Suriname Svalbard and Jan Mayen Swaziland Sweden Switzerland Syrian Arab Republic Taiwan Tajikistan Tanzania, United Republic of Thailand Timor-Leste Togo Tokelau Tonga Trinidad and Tobago Tunisia Turkey Turkmenistan Turks and Caicos Islands Tuvalu Uganda Ukraine United Arab Emirates United Kingdom United States Minor Outlying Islands Uruguay Uzbekistan Vanuatu Venezuela, Bolivarian Republic of Vietnam Virgin Islands, British Wallis and Futuna Western Sahara Yemen Zambia Zimbabwe

April 2004

Recently, the Diamond Dealers Club had an interesting briefing by Nicholas Del Re, GG, B.Sc., manager of gemological services for the European Gemological Laboratory USA on the KM laser treatment.

Del Re said that in the past decade, lasering technology has become increasingly sophisticated. Israeli drillers developed a new kind of drilling, called Kiduah Meyuhad, meaning “special drill” in Hebrew. Instead of a traditional laser drill hole, the KM produces a sheet-like feather running up to the surface, which is visible via normal ten power magnification. It can be very natural looking and if the treatment has successfully bleached out the black inclusion, it can be difficult to distinguish the KM treated inclusions from natural ones.

In the past year, EGL has seen a new generation of the treatment — “Micro KM.” At 10-power and even 100-power magnification, the laser drilling appeared to be confined with the diamond, so it looked like it had not been treated. The only way you can see this new treatment is under 200– and 1,000-power magnification.

To demonstrate how small this treatment is, Del Re noted that the break in the surface is approximately five microns. The width of a human hair is only 80 microns. In other words, this treatment makes the drill hole basically invisible.

We think this new treatment raises a serious issue, even though it is only available for SI grades or below. After considerable debate, the Federal Trade Commission rules a few years ago that you must disclose laser drilling. This is now the law. But unless the stone is certified, how could any jeweler disclose something to their consumer that can’t even be seen under a 100-power microscope? And even if they did tell them, does knowledge of such a minute hole help the consumer in any way?

Related Articles

Diamond jewelry demand grew to an all time record
Blog Archive

Diamond jewelry demand grew to an all time record

Historic Blue Diamond fetches $6.7 million
Blog Archive

Historic Blue Diamond fetches $6.7 million

Recap of the best diamond jewelry at Met Gala 2018
Blog Archive

Recap of the best diamond jewelry at Met Gala 2018