Precious Metals Conversion Information

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class="nist-page__title">Precious Metals Conversion Information</h1> </div> <div class="nist-block">  <div data-elastic-exclude class="nist-block nist-social__wrapper"> <h2 class="nist-social__title">Share</h2> <div class="social-media-sharing"> <div class="nist-social__wrapper--share"> <div> <a target="_blank" rel="noopener" href="https://web.archive.org/web/20230318102312/https://www.facebook.com/share.php?u=https://www.nist.gov/pml/owm/laws-and-regulations/precious-metals-conversion" title="Facebook" class="nist-social nist-social--facebook-gray"> <span>Facebook</span> </a> </div> <div> <a target="_blank" rel="noopener" href="https://web.archive.org/web/20230318102312/https://www.linkedin.com/shareArticle?mini=true&url=https://www.nist.gov/pml/owm/laws-and-regulations/precious-metals-conversion&source=https://www.nist.gov/pml/owm/laws-and-regulations/precious-metals-conversion" title="Linkedin" class="nist-social nist-social--linkedin-gray"> <span>Linkedin</span> </a> </div> <div> <a target="_blank" rel="noopener" href="https://web.archive.org/web/20230318102312/https://twitter.com/intent/tweet?url=https://www.nist.gov/pml/owm/laws-and-regulations/precious-metals-conversion&status=https://www.nist.gov/pml/owm/laws-and-regulations/precious-metals-conversion" title="Twitter" class="nist-social nist-social--twitter-gray"> <span>Twitter</span> </a> </div> <div> <a href="https://web.archive.org/web/20230318102312/mailto:/?subject=NIST.gov&body=Check out this site https://www.nist.gov/pml/owm/laws-and-regulations/precious-metals-conversion" title="Email" class="nist-social nist-social--envelope-gray"> <span>Email</span> </a> </div> </div> </div> </div>  </div> <div class="nist-block"> <div class="text-with-summary"> <figure class="align-right nist-image--lightbox nist-image" data-lightbox="https://www.nist.gov/sites/default/files/styles/2800_x_2800_limit/public/images/pml/wmd/metric/goldbars2_1.jpg?itok=fhhUcJtT" data-media-id="191121"><img alt="gold bars" height="247" loading="lazy" src="/web/20230318102312im_/https://www.nist.gov/sites/default/files/styles/480_x_480_limit/public/images/pml/wmd/metric/goldbars2_1.jpg?itok=mXe3vg02" typeof="foaf:Image" width="480"><figcaption class="nist-image__caption"><div class="nist-image__caption-content" data-caption-editable="true"> </div> </figcaption></figure><p>The Office of Weights and Measures (OWM) has prepared a <strong>Conversion Factors for Precious Metal Sales</strong> chart [<a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="43982727-c5fc-416d-8924-deaeaac0bf34" href="https://web.archive.org/web/20230318102312/https://www.nist.gov/document/precious-metals-conversion-information-march2015pdf">PDF</a>] to assist consumers and businesses in facilitating value comparison. <a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="fa5f090d-3d55-4b00-ab15-1051eb3fd584" href="/web/20230318102312/https://www.nist.gov/pml/owm/weights-measures-resources/state-weights-measures-directors" title="State Directors">State weights and measures programs</a> are encountering an increasing number of scrap gold buyers and sellers that use scales which weigh in milligrams (mg) and grams (g). The carat (c) is another common measurement unit used in jewelry sales to measure gemstones. The carat had its origin in the carob seed, which later standardized a 1/444 ounce and then 0.2 gram (or 200 mg).</p> <p>聽</p> <figure class="align-center nist-image--lightbox nist-image" data-lightbox="https://www.nist.gov/sites/default/files/styles/2800_x_2800_limit/public/images/pml/wmd/metric/diamond-carat-scale_1.jpg?itok=vwRND-jQ" data-media-id="190671"><img alt="sizes of carats" height="316" loading="lazy" src="/web/20230318102312im_/https://www.nist.gov/sites/default/files/styles/960_x_960_limit/public/images/pml/wmd/metric/diamond-carat-scale_1.jpg?itok=MueWoun9" typeof="foaf:Image" width="510"><figcaption class="nist-image__caption"><div class="nist-image__caption-content" data-caption-editable="true"> </div> </figcaption></figure><h3>2.17. Precious Metals*.</h3> <blockquote> <p><strong>2.17.1. Definition.</strong></p> </blockquote> <blockquote> <blockquote><strong><em>2.17.1.1. Precious Metals</em></strong>. - Gold, silver, platinum, or any item composed partly or completely of these metals or their alloys and in which the market value of the metal in the item is principally the gold, silver, or platinum component.</blockquote> </blockquote> <blockquote><strong>2.17.2. Quantity.</strong> - The unit of measure and the method of sale of precious metals, if the price is based in part of wholly on a weight determination, shall be either troy weight or SI units. When the measurement or method of sale is expressed in SI units of mass, a conversion chart to troy units shall be prominently displayed so as to facilitate price comparison. The conversion chart shall also display a table of troy weights indicating grains, pennyweights, and troy ounces.<br> (Added 1982)<br> 聽</blockquote> <address>*<a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="d2fe7244-4c76-492b-bdf6-1ac3ee9b3143" href="/web/20230318102312/https://www.nist.gov/pml/owm/publications/nist-handbooks/handbook-130-current-edition" title="NIST Handbook 130 - Current Edition">NIST Handbook 130</a> <em>Uniform Laws and Regulations in the Areas of Legal Metrology and Engine Fuel Quality</em>. Uniform Regulation for the Method of Sale of Commodities, Section 2.17.</address> </div> </div> <div class="nist-block">  <div data-elastic-exclude="" class="nist-tags"> <a href="/web/20230318102312/https://www.nist.gov/topic-terms/metric" hreflang="en">Metric</a></div>  </div> </div> </div> </div> <div class="grid-container"> <div class="nist-page__region nist-page__region--content-bottom"> <div class="nist-block nist-block--contact"> <h2 class="nist-block__title">Contacts</h2> <div class="nist-contact"> <ul class="nist-contact__items"> <li class="nist-contact__item"> <div class="nist-contact__name"> Metric Program </div> <div> <a href="https://web.archive.org/web/20230318102312/mailto:TheSI@nist.gov">TheSI@nist.gov</a> </div> <div> </div> </li> </ul> </div> </div> <div class="nist-block"> <div class="text-italic font-sans-2xs"> Created February 9, 2011, Updated June 30, 2022 </div> </div> </div> </div> </section> </div> <div data-elastic-exclude>  <footer class="nist-footer padding-bottom-4"> <div class="grid-container nist-footer__info"> <div class="grid-row"> <div class="tablet:grid-col-6"> <div class="nist-footer__logo"> <a href="/web/20230318102312/https://www.nist.gov/" title="National Institute of Standards and Technology" rel="home"> <img class="nist-footer__logo-img" src="/web/20230318102312im_/https://www.nist.gov/libraries/nist-component-library/dist/img/logo/NIST-Logo-Brand-White.svg" alt="National Institute of Standards and Technology logo" width="300px" height="42px"/> </a> </div> <div class="nist-footer__contact"> <h3 class="nist-footer__contact-heading">HEADQUARTERS</h3> <address> 100 Bureau Drive<br> Gaithersburg, MD 20899<br> <a href="https://web.archive.org/web/20230318102312/tel:301-975-2000">301-975-2000</a> </address> <p> <a href="https://web.archive.org/web/20230318102312/mailto:do-webmaster@nist.gov">Webmaster</a> | <a href="https://web.archive.org/web/20230318102312/https://www.nist.gov/about-nist/contact-us">Contact Us</a> | <a href="https://web.archive.org/web/20230318102312/https://www.nist.gov/visit">Our Other Offices</a> </p> </div> </div> <div class="tablet:grid-col-6"> <div class="nist-footer__social-links"> <a class="nist-social nist-social--twitter-white" href="https://web.archive.org/web/20230318102312/https://twitter.com/NIST"> <span>Twitter</span> </a> <a class="nist-social nist-social--facebook-white" href="https://web.archive.org/web/20230318102312/https://www.facebook.com/NIST"> <span>Facebook</span> </a> <a class="nist-social nist-social--linkedin-white" href="https://web.archive.org/web/20230318102312/https://www.linkedin.com/company/nist"> <span>LinkedIn</span> </a> <a class="nist-social nist-social--instagram-white" href="https://web.archive.org/web/20230318102312/https://www.instagram.com/nist/"> <span>Instagram</span> </a> <a class="nist-social nist-social--youtube-white" href="https://web.archive.org/web/20230318102312/https://www.youtube.com/NIST"> <span>YouTube</span> </a> <a class="nist-social nist-social--giphy-white" href="https://web.archive.org/web/20230318102312/https://giphy.com/nist"> <span>Giphy</span> </a> <a class="nist-social nist-social--rss-white" href="https://web.archive.org/web/20230318102312/https://www.nist.gov/news-events/nist-rss-feeds"> <span>RSS Feed</span> </a> <a class="nist-social nist-social--envelope-white" href="https://web.archive.org/web/20230318102312/https://public.govdelivery.com/accounts/USNIST/subscriber/new"> <span>Mailing List</span> </a> </div> <div class="nist-footer__feedback"> How are we doing? 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