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2. List of fictional elements, materials, isotopes and subatomic ...

   en.wikipedia.org/wiki/List_of_fictional_elements...

   A material 400 times harder than diamond, the 12th Doctor spends 4.5 billion years in a confession dial in the episode "Heaven Sent", continually dying and being recreated, taking the aforementioned 4.5 billion years to make it out of the confession dial by punching through an Azbantium wall. Bavarium: Just Cause 3

3. Superhard material - Wikipedia

   en.wikipedia.org/wiki/Superhard_material

   In 2001, a diamond-like-structured c-BC 2 N was synthesized at pressures >18 GPa and temperatures >2,200 K by a direct solid-state phase transition of graphite-like (BN) 0.48 C 0.52. The reported Vickers and Knoop hardnesses were intermediate between diamond and c-BN, making the new phase the second hardest known material. [ 39 ]

4. Ultra-high temperature ceramic - Wikipedia

   en.wikipedia.org/wiki/Ultra-high_temperature_ceramic

   The addition of rare earth oxides such as Y 2 O 3, Yb 2 O 3, La 2 O 3 and Nd 2 O 3 can lower densification temperatures and can react with surface oxides to promote densification. [59] Hot pressing may result in improved densities for UHTCs, but it is an expensive technique that relies on high temperatures and pressures to provide useful materials.

5. The 10 best places to buy jewelry online in 2024 - AOL

   www.aol.com/lifestyle/best-places-to-buy-jewelry...

   Pear Diamond Solitaire Engagement Ring, 2.75 ct. In addition to its custom designs, the brand offers a selection of ready-to-ship engagement rings, including this pear-shaped solitaire.

6. Borazon - Wikipedia

   en.wikipedia.org/wiki/Borazon

   Its color ranges from black to brown and gold, depending on the chemical bond. It is one of the hardest known materials, along with various forms of diamond and other kinds of boron nitride. Borazon is a crystal created by heating equal quantities of boron and nitrogen at temperatures greater than 1800 °C (3300 °F) at 7 GPa (1 million lbf/in 2).

7. Diamond simulant - Wikipedia

   en.wikipedia.org/wiki/Diamond_simulant

   Diamond simulants and their gemological properties; Material Formula Refractive index(es) 589.3 nm Dispersion 431–687 nm Hardness (Mohs' scale) Density (g/cm 3) Thermal condc. State of the art Diamond: C: 2.417 0.044 10 3.52 Excellent Artificial simulants Flint glass: Silica with Pb, Al, Tl ~ 1.6 > 0.020 < 6 2.4–4.2 Poor 1700– White ...