Use & cite

Link to us

Cite a page, embed one of the free tools or use the logo. Fastemy’s own tables, charts and data are free to reuse under CC BY 4.0 with a link to the source.

Cite a page

Every article, guide, tool and app page ends with a Cite or link to this page box: a ready-made HTML link, and APA (7th ed.) and MLA (9th ed.) references with the page’s own title, author and date. Articles are credited to their author, Abdullah Yılmaz; guides, tools and app pages to Fastemy. For example:

APAYılmaz, A. (2026, September 14). Carat vs Size: Why a 0.90ct Looks Like a 1.00ct. Fastemy. https://fastemy.com/blog/diamond-carat-vs-size

MLA“The Diamond Guide: Grading, Value and How to Tell If It’s Real.” Fastemy, 14 Sept. 2026, fastemy.com/guides/diamonds.

Link with whatever words fit your sentence, to the page you actually used. There is nothing to sign up for and nothing to link back in return.

Reuse our tables and data

Fastemy’s own tables, charts and data — the millimetre tables of the diamond size chart, for example — are free to reuse under CC BY 4.0 with a link to the source page. The licence covers only what Fastemy made: quotes from third parties, photos and app screenshots on our pages are not included.

Embed a free tool

These tools can run on your own page in a frame. The code adds the frame and one line under it with a plain link to Fastemy.

Diamond Size Chart

Carat weight to millimetres for ten diamond shapes, with a true-to-scale preview and a full printable table.

Embed code
<iframe src="https://fastemy.com/embed/diamond-size-chart" title="Diamond Size Chart" width="100%" height="1100" loading="lazy" style="border:0"></iframe>
<p>Diamond Size Chart by <a href="https://fastemy.com/tools/diamond-size-chart">Fastemy</a></p>

Free to reuse under CC BY 4.0 with a link to the source.

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Louis Vuitton Date Code Decoder

Turn an LV date code into a factory country and production period — and check whether the format fits the bag.

Embed code
<iframe src="https://fastemy.com/embed/louis-vuitton-date-code" title="Louis Vuitton Date Code Decoder" width="100%" height="600" loading="lazy" style="border:0"></iframe>
<p>Louis Vuitton Date Code Decoder by <a href="https://fastemy.com/tools/louis-vuitton-date-code">Fastemy</a></p>

Free to reuse under CC BY 4.0 with a link to the source.

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UK Hallmark Decoder

Type the number in a British hallmark — 375, 750, 925, 950 — for the metal and carat, then match the assay office mark, the symbol and the date letter.

Embed code
<iframe src="https://fastemy.com/embed/uk-hallmark-decoder" title="UK Hallmark Decoder" width="100%" height="680" loading="lazy" style="border:0"></iframe>
<p>UK Hallmark Decoder by <a href="https://fastemy.com/tools/uk-hallmark-decoder">Fastemy</a></p>

Free to reuse under CC BY 4.0 with a link to the source.

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The Fastemy mark, as the site serves it:

Contact

A question, a correction, or a page of yours that links to us: write to contact@fastemy.com.