Spinel - Wikipedia
Spinel (/ 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 …
Spinel group - Wikipedia
The spinels are any of a class of minerals of general formulation AB 2 X 4 which crystallise in the cubic (isometric) crystal system, with the X anions (typically chalcogens, like oxygen and sulfur) arranged in a cubic close-packed lattice and the cations A and B occupying some or all of the octahedral and tetrahedral sites in the lattice.
Spinel Gem, Price, and Jewelry Information - Gem Society
Spinels 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.
Spinel Gemstone | Spinel Stone - GIA
Overview. About Spinel. View Gallery. Until recently, spinel was an underappreciated gem with little consumer recognition. Increasing demand for ruby alternatives rekindled appreciation for spinel’s rich red color and history.
13 Gemmy Facts About Spinel - The Overlooked Gem - Geology.com
Spinel 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 one of the world's most overlooked gems.
Spinel Gemstone | Spinel Stone - GIA
Although the spinels of history are impressively large, this gem is rare in sizes above five carats today. Standard-cut, or calibrated, stones are available, usually in 6×4-mm and 7×5-mm sizes, suitable for center stones in rings.
Spinel Gem Guide and Properties Chart - Gemstones.com
Spinel is a mineral species belonging to a larger group of minerals with similar structures known as the spinel group. The spinel group is made up of spinel, gahnospinel, and gahnite. Spinel is the only one in the group widely used in jewelry. Spinel was first synthesized in the 1920’s.
Spinel Stone Meaning, Value, Price, and Properties - Gem Rock …
2021年8月27日 · Spinels are beautiful natural gemstones most desired in fiery red and orange hues. Spinels are not rubies, but a class all their own. Learn all about spinel meaning, value, properties, and price in this comprehensive guide.
Spinel Meanings and Crystal Properties - The Crystal Council
Spinel is a rare aluminum magnesium oxide mineral that crystallizes in the form of octahedral crystals, dodecahedral, cubic, and massive formations. It can be seen in a variety of different colors such as red, blue, green, violet, black, yellow, …
Spinel: Red and blue gems confused with ruby and sapphire - Geology.com
Spinel occurs in the same bright red and blue colors as rubies and sapphires. Spinel forms in the same rock units, under the same geological conditions, and is found in the same gravels. Found among rubies and sapphires, it is not surprising that ancient gem traders misidentified spinel.