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2. Tanzanite - Wikipedia

   en.wikipedia.org/wiki/Tanzanite

   Present, dichroism or trichroism, depending on heat treatment. Tanzanite is the blue and violet variety of the mineral zoisite (a calcium aluminium hydroxyl sorosilicate), caused by small amounts of vanadium. [3] Tanzanite belongs to the epidote mineral group. Tanzanite is only found in Simanjiro District of Manyara Region in Tanzania, in a ...

3. Prices of chemical elements - Wikipedia

   en.wikipedia.org/wiki/Prices_of_chemical_elements

   Graphite flakes can cost around US$0.9/kg carbon. [20] Price of synthetic industrial diamond for grinding and polishing can range from 1200 to 13 300 USD/kg, while cost per weight of large synthetic diamonds for industrial applications can be on the order of million dollars per kilogram. [21] 7: N: Nitrogen: 0.0012506: 19 (5.263 × 10 17 kg) 0. ...

4. Painite - Wikipedia

   en.wikipedia.org/wiki/Painite

   Solubility. Insoluble in acids [4] References. [3][5][6] Painite is a very rare borate mineral. It was first found in Myanmar by British mineralogist and gem dealer Arthur C.D. Pain who misidentified it as ruby, until it was discovered as a new gemstone in the 1950s. When it was confirmed as a new mineral species, the mineral was named after him.

5. How Much Is a Diamond Worth? How To Find the Value of Your ...

   www.aol.com/finance/much-diamond-worth-value...

   Carats: What a Diamond Weighs. The weight of a diamond is one of these variables that determines a diamond’s worth and is what the general public is most familiar with. The unit of measurement ...

6. Cardinal gem - Wikipedia

   en.wikipedia.org/wiki/Cardinal_gem

   Clockwise from top: sapphire, ruby, emerald, amethyst, diamond. Cardinal gems are gemstones which have traditionally been considered precious above all others. The classification of the cardinal gems dates back to antiquity, and was largely determined by ceremonial or religious use as well as rarity. [1] The term has largely fallen out of use.

7. Diamond industry ‘in trouble’ as lab-grown gemstones tank ...

   www.aol.com/news/diamond-industry-trouble-lab...

   Lab-grown diamond sales surged from just 2% of the global diamond jewelry market in 2017 to 18.4% in 2023, according to data provided by Zimnisky. Additionally, the case for buying diamonds as an ...