Spinel - Wikipedia
WebSpinel ( / spɪˈnɛl, ˈspɪnəl / [7]) 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, a diminutive form of spine, in reference to its pointed crystals. [5] Properties. Cut spinel.
Spinel group - Wikipedia
WebSpinels are grouped in series by the B cation. The group is named for spinel ( MgAl. 2O. 4 ), which was once known as "spinel ruby ". [4] ( Today the term ruby is used only for corundum .) Spinel group members. Members of the spinel group include: [5] Aluminium spinels: Spinel: MgAl2O4, after which this class of minerals is named. Gahnite: ZnAl2O4.
Spinel Value, Price, and Jewelry Information - Gem Society
WebSpinels make ideal stones for any type of jewelry, including engagement rings and other pieces intended for daily wear. You will also find spinels usually have considerably lower prices than alexandrites, rubies, sapphires, and diamonds.
13 Gemmy Facts About Spinel - The Overlooked Gem - Geology.com
WebSpinel is a new birthstone with vivid colors that span the spectrum. It has a spectacular luster, excellent durability, and its current price might be at a low that you will never see again. Here are 13 reasons why I believe that spinel is …
Spinel Gemstone | Spinel Stone - GIA
WebFacts. Mineral: spinel. Chemistry: MgAl 2 O 4. Color: red, orange, pink, purple, blue, black. Refractive index: 1.718. Birefringence: none. Specific gravity: 3.60. Mohs Hardness: 8. Treatments. There are a number of processes used to alter the color, apparent clarity, or improve the durability of gems. Learn More. Synthetics.
Spinel: The mineral Spinel information and pictures
WebAdvertising Information. The spinel Mineral Series. Spinel occurs in almost every color, and forms gem s of all colors. It is not a well known gem, although good specimens can attain very high prices. Bright red Spinel, known as Ruby Spinel, is the most valuable Spinel.
Spinel Gemstone | Spinel Stone - GIA
WebThe most valued spinel colors are the vivid reds and cobalt blues that remind us why spinel was once confused with ruby and sapphire. Although the most commercially important colors are red and pink, mauve- or lilac-colored gems are also attractive, and some blue spinel colors can be very valuable.
Spinel Description - GIA
WebSpinel offers a range of hues, from orange to intense “stoplight” red, vibrant pink, and all shades of purple, blue, and violet through bluish green. Intense reds and pinks are caused by traces of chromium. The higher the chromium content, the stronger the red hue. Orange and purple stones owe their color to a mixture of iron and chromium.
Spinel | Gemstone, Hardness, Structure | Britannica
WebMar 22, 2024 · Spinel, mineral composed of magnesium aluminum oxide (MgAl2O4) or any member of a group of rock-forming minerals, all of which are metal oxides with the general composition AB2O4, in which A may be magnesium, iron, zinc, manganese, or nickel; B may be aluminum, chromium, or iron; and O is oxygen.
Spinel: Red and blue gems confused with ruby and sapphire - Geology.com
WebADVERTISEMENT. Table of Contents. What Is Spinel? Spinel the Mineral. Spinel the Gem. Spinel: August Birthstone. Spinel Mineral Group. The Ruby and Sapphire Impostor. Why the Confusion? "Ruby" Spinels. Diagnostic Differences. Synthetic Spinel. Alluvial spinel: Much of the spinel used to produce gemstones is obtained from alluvial deposits.
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