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  2. Tantalum - Wikipedia

    en.wikipedia.org/wiki/Tantalum

    Tantalum is a chemical element; it has symbol Ta and atomic number 73. It is named after Tantalus, a figure in Greek mythology. [11] Tantalum is a very hard, ductile ...

  3. Hardnesses of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Hardnesses_of_the_elements...

    This page was last edited on 16 November 2024, at 12:16 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  4. Tracy Hall - Wikipedia

    en.wikipedia.org/wiki/Tracy_Hall

    Hall produced synthetic diamond in a press of his own design [2] on December 16, 1954, and showed that he and others could repeat the process following Hall's procedure, a success which led to the creation of a major supermaterials industry. Hall was one of a group of about a half dozen researchers who had focused on achieving the synthesis for ...

  5. What Are the Key Differences Between Lab-Grown and Natural ...

    www.aol.com/key-differences-between-lab-grown...

    A real diamond is just that: one that’s originally found in nature. However, Jhaveri tries to use the term ‘natural’ when describing them, saying that lab-grown diamonds are just as real as ...

  6. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    Carbon in the form of diamond can be more expensive than rhodium. Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars. ... Tantalum: 16. ...

  7. Mohs scale - Wikipedia

    en.wikipedia.org/wiki/Mohs_scale

    Diamond (Mohs 10) is 1500 (off scale). Diamond was the hardest known naturally occurring mineral when the scale was designed, and defines the top of the scale, arbitrarily set at 10. The hardness of a material is measured against the scale by finding the hardest material that the given material can scratch, or the softest material that can ...

  8. Coltan - Wikipedia

    en.wikipedia.org/wiki/Coltan

    A piece of columbite–tantalite, size 6.0 × 2.5 × 2.1 cm. Coltan (short for columbite–tantalites and known industrially as tantalite) is a dull black metallic ore from which the elements niobium and tantalum are extracted.

  9. Ads for British diamond firm banned for misleading ‘real’ claims

    www.aol.com/ads-british-diamond-firm-banned...

    Ads for Skydiamond did not make clear to consumers that the gems were synthetic, the Advertising Standards Authority ruled.

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