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2. Moissanite - Wikipedia

   en.wikipedia.org/wiki/Moissanite

   Moissanite (/ ˈmɔɪsəˌnaɪt /) [ 5 ] is naturally occurring silicon carbide and its various crystalline polymorphs. It has the chemical formula SiC and is a rare mineral, discovered by the French chemist Henri Moissan in 1893. Silicon carbide or moissanite is useful for commercial and industrial applications due to its hardness, optical ...

3. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   A collection of gemstone pebbles made by tumbling the rough stones, except the ruby and tourmaline, with abrasive grit inside a rotating barrel. The largest pebble here is 40 mm (1.6 in) long. The traditional classification in the West, which goes back to the ancient Greeks, begins with a distinction between precious and semi-precious; similar ...

4. Diamond (gemstone) - Wikipedia

   en.wikipedia.org/wiki/Diamond_(gemstone)

   Diamond[a] is a gemstone formed by cutting a raw diamond. Diamonds are one of the best-known and most sought-after gems, and they have been used as decorative items since ancient times. The hardness of diamond and its high dispersion of light —giving the diamond its characteristic "fire"—make it useful for industrial applications and ...

5. Aurora Pyramid of Hope - Wikipedia

   en.wikipedia.org/wiki/Aurora_Pyramid_of_Hope

   The Aurora Pyramid of Hope is a collection of 296 cut natural diamonds in a wide variety of colors, billed as "the most comprehensive natural color diamond collection in the world". [1] It is owned by Aurora Gems, Inc., a diamond merchant specialising in fancy color diamonds. The collection has been displayed on loan in a pyramid-shaped display ...

6. Synthetic diamond - Wikipedia

   en.wikipedia.org/wiki/Synthetic_diamond

   Lab-grown diamonds of various colors grown by the high-pressure-and-temperature technique. A laboratory-grown diamond (LGD), also called a lab-grown diamond, [1] laboratory-created, man-made, artisan-created, artificial, synthetic, or cultured diamond, is diamond that is produced in a controlled technological process (in contrast to naturally formed diamond, which is created through geological ...

7. Ruby - Wikipedia

   en.wikipedia.org/wiki/Ruby

   Ruby is a pinkish red to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Ruby is one of the most popular traditional jewelry gems and is very durable. Other varieties of gem-quality corundum are called sapphires. Ruby is one of the traditional cardinal gems, alongside amethyst, sapphire, emerald, and diamond. [3]