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2. Spinel - Wikipedia

   en.wikipedia.org/wiki/Spinel

   Polyhedral representation of spinel MgAl 2 O 4. Spinel (/ s p ɪ ˈ n ɛ l, ˈ s p ɪ n əl / [7]) is the magnesium/aluminium member of the larger spinel group of minerals. It has the formula MgAl 2 O 4 in the cubic crystal system. Its name comes from the Latin word spinella, a diminutive form of spine, in reference to its pointed crystals. [5]

3. List of Steven Universe characters - Wikipedia

   en.wikipedia.org/wiki/List_of_Steven_Universe...

   The main antagonist of Steven Universe: The Movie, Spinel (voiced by Sarah Stiles) was created to be Pink Diamond's playmate on Homeworld, but was left behind when Pink took charge of the Gem colonization of Earth. Spinel is furious that Pink abandoned her, made new friends and ended her life without ever returning for her; in revenge, she ...

4. Spinel group - Wikipedia

   en.wikipedia.org/wiki/Spinel_group

   Inverse spinel structures have a different cation distribution in that all of the A cations and half of the B cations occupy octahedral sites, while the other half of the B cations occupy tetrahedral sites. An example of an inverse spinel is Fe 3 O 4, if the Fe 2+ (A 2+) ions are d 6 high-spin and the Fe 3+ (B 3+) ions are d 5 high-spin.

5. List of minerals - Wikipedia

   en.wikipedia.org/wiki/List_of_minerals

   Amethyst crystals – a purple quartz Apophyllite crystals sitting right beside a cluster of peachy bowtie stilbite Aquamarine variety of beryl with tourmaline on orthoclase Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals Austinite from the Ojuela Mine, Mapimí, Durango, Mexico Ametrine ...

6. Gemstone Meanings: Power and Significance of the 25 Most ...

   www.aol.com/gemstone-meanings-power-significance...

   Amethyst “Amethyst is a gemstone long associated with royalty and spiritualism and is said to bring tranquility and healing,” Salzer says. “In the same color spectrum wavelength as the third ...

7. Taaffeite - Wikipedia

   en.wikipedia.org/wiki/Taaffeite

   Most pieces of the gem, prior to Taaffe, had been misidentified as spinel. For many years afterwards, it was known only in a few samples, and it is still one of the rarest gemstone minerals in the world. [6] Since 2002, the International Mineralogical Association-approved name for taaffeite as a mineral is magnesiotaaffeite-2N'2S.