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https://www.gia.edu/spinel-description
Jul 29, 2021 · The spinel used in jewelry is a small part of a group of minerals that share the same crystal structure. Not all of them form transparent crystals suitable for jewelry use, however. Spinel offers a range of hues, from orange to intense “stoplight” red, vibrant pink, and all shades of purple, blue, and violet through bluish green.
http://www.golddefinitions.com/jewelry-information/gemstones/spinel
A hard and durable gemstone, spinel is commonly used as a replacement for ruby or sapphire for jewelry. Spinel was only recognized as its own gem species as late as 1587, after a long career of masquerading as ruby – it can even be found on several of the Crown Jewels.
https://www.gia.edu/spinel
Spinel belongs to the cubic crystal system and its characteristic crystal shape is an octahedron, which looks like two back-to-back pyramids. Perfect for Jewelry Like ruby, spinel is found in alluvial deposits; it ranks 8 on the Mohs scale and has good toughness, making it a durable gem for jewelry.
https://en.mimi.hu/jewelry/spinel.html
Spinel is the great imposter of gemstone history: many famous rubies in crown jewels around the world are actually spinel. Spinel Because it was often found with corundum in gem deposits and has a similar color range , luster and hardness , it was, until modern times, used unknowingly as sapphire , …
https://www.gemsociety.org/article/spinel-jewelry-and-gemstone-information/
Mar 18, 2016 · Spinels are allochromatic gemstones. This means that when the mineral is pure, it’s colorless. Colors are derived only from the presence of trace elements acting as chromophores. Chromium, iron, and cobalt are the most common chromophores in spinel.Name: Spinel
https://www.merriam-webster.com/dictionary/spinel
Jun 22, 2021 · Definition of spinel. 1 : a hard crystalline mineral consisting of an oxide of magnesium and aluminum that varies from colorless to ruby red to black and is used as a gem. 2 : any of a group of minerals that are essentially oxides of magnesium, ferrous iron, zinc, or manganese.
https://www.langantiques.com/university/spinel/
Spinel Spinel is a magnesium aluminum oxide, occurring in many colors with excellent durability. Natural spinel is really a group of related minerals in which its magnesium is substituted with other elements, like iron, manganese and zinc. Spinel is found in areas that are famous for sapphire deposits.
https://en.mimi.hu/jewelry/synthetic_spinel.html
Natural Spinel ~ is common in synthetic birthstone jewelry. However, natural spinel is a hard and beautiful gem that is suitable for all gemstone uses. It also comes in a wide variety of colors, including ruby red. To find out more, Check out the Author's website at: Natural Spinel ...
https://en.wikipedia.org/wiki/Spinel
Spinel ( / spɪˈnɛl /) is the magnesium/aluminium member of the larger spinel group of minerals. It has the formula MgAl. 2O. 4 in the cubic crystal system. Its name comes from the Latin word spinella, which means spine in reference to its pointed crystals.
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