QR code micro-certified gemstones: femtosecond writing and Raman characterization in Diamond, Ruby and Sapphire
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Nanomaterials, Free Full-Text
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QR coding diamonds with precision femtosecond-laser technology
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QR code micro-certified gemstones: femtosecond writing and Raman characterization in Diamond, Ruby and Sapphire
![QR code micro-certified gemstones: femtosecond writing and Raman characterization in Diamond, Ruby and Sapphire](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41598-022-09858-7/MediaObjects/41598_2022_9858_Fig9_HTML.png)
A novel approach for audible acoustic quick response codes
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Nanomaterials, Free Full-Text
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QR coding diamonds with precision femtosecond-laser technology
![QR code micro-certified gemstones: femtosecond writing and Raman characterization in Diamond, Ruby and Sapphire](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41598-019-45405-7/MediaObjects/41598_2019_45405_Fig5_HTML.png)
QR code micro-certified gemstones: femtosecond writing and Raman characterization in Diamond, Ruby and Sapphire
Andre Jaques Batista - Application Development Senior Analyst - Accenture
![QR code micro-certified gemstones: femtosecond writing and Raman characterization in Diamond, Ruby and Sapphire](https://www.oceaninsight.com/globalassets/catalog-blocks-and-images/blog/gemstone-analysis/gemblog_figure-1---raman-of-gemstones.jpg)
Gemstone Analysis and Authentication
![QR code micro-certified gemstones: femtosecond writing and Raman characterization in Diamond, Ruby and Sapphire](https://www.researchgate.net/publication/265200028/figure/fig5/AS:668362501787658@1536361446216/This-034-ct-Fancy-Light-gray-blue-diamond-was-successfully-turned-Fancy-blue-by-HPHT.jpg)
This 0.34 ct Fancy Light gray-blue diamond was successfully turned
![QR code micro-certified gemstones: femtosecond writing and Raman characterization in Diamond, Ruby and Sapphire](https://www.researchgate.net/publication/265200028/figure/fig14/AS:668362501812239@1536361446551/Tanzanite-coated-with-a-cobalt-colored-material-was-of-great-concern-for-a-brief-time.png)
Tanzanite coated with a cobalt-colored material was of great concern
![QR code micro-certified gemstones: femtosecond writing and Raman characterization in Diamond, Ruby and Sapphire](https://www.researchgate.net/publication/329518945/figure/tbl2/AS:701769793421314@1544326365472/Average-value-of-color-parameters-of-the-five-color-charts-under-the-three-illuminants.png)
Average value of color parameters of the five color charts under the
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