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2. Carbuncle (gemstone) - Wikipedia

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

   A polished almandine stone . Carbuncle (/ ˈ k ɑːr b ʌ ŋ k əl /) is another name for a deep red almandine gemstone that has been cut with a smooth, convex face in a method called cabochon. [1] Traditionally, the term referred to any red gemstone, most often a red garnet. [2] Carbuncles and their chimeras have spanned three millennia.

3. Stonesetting - Wikipedia

   en.wikipedia.org/wiki/Stonesetting

   A channel setting is a method whereby stones are suspended between two bars or strips of metal, called channels. Typically, a line of small stones set between two bars is called a channel setting, and a design where the bars cross the stones is called a bar set. The channel is a variation of a "U" shape, with two sides and a bottom.

4. Diamond simulant - Wikipedia

   en.wikipedia.org/wiki/Diamond_simulant

   Non-destructive testing is preferred because most suspected diamonds are already cut into gemstones and set in jewelry, and if a destructive test (which mostly relies on the relative fragility and softness of non-diamonds) fails, it may damage the simulant—an unacceptable outcome for most jewelry owners, as even if a stone is not a diamond ...

5. Tsavorite - Wikipedia

   en.wikipedia.org/wiki/Tsavorite

   In late 2006, a 925-carat (185.0 g) crystal was discovered. It yielded an oval mixed-cut 325 carat (65 g) stone, one of the largest, if not the largest, faceted tsavorites in the world. A crystal that yielded a 120.68-carat (24.136 g) oval mixed-cut gem was also uncovered in early 2006. [7]

6. Corona (fictional world) - Wikipedia

   en.wikipedia.org/wiki/Corona_(fictional_world)

   (See Unique stones, below.) Amber: allows the user to walk on water. Cabochon garnet: allows the user to detect the use of stone magic. It is sometimes called a 'carbuncle' or 'Dragon's Sight'. Celestine: can be thrown to create a firecracker-like explosion. Unlike other stones, a celestine is destroyed in creating its effect.

7. Asterism (gemology) - Wikipedia

   en.wikipedia.org/wiki/Asterism_(gemology)

   Asterism is generated by reflections of light from twin-lamellae or from extremely fine needle-shaped acicular inclusions within the stone's crystal structure. [1] A common cause is oriented sub-microscopic crystals of rutile within the gem mineral. It occurs in rubies, sapphires, garnet, diopside, and spinel when a cabochon is cut from a ...