Spinel (/ spɪˈnɛl, ˈspɪnəl / [7]) is the magnesium / aluminium member of the larger spinel group of minerals. It has the formula MgAl. 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]

For centuries, spinel, the great imposter, masqueraded as ruby in Europe’s crown jewels. The finest red spinel colors are pure red to slightly purplish red hues of medium to medium-dark tone. Spinel is most often cut in cushion and oval shapes; when properly proportioned it …

2024年5月29日 · The most comprehensive guide for spinel gemstones on the web. Learn about its properties, value, what the experts think, and more.

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. The Most Overlooked Gem?

2021年8月2日 · Spinel is a mineral with a lot of history. Long mined in Sri Lanka, Afghanistan, Myanmar, Vietnam, and Thailand, spinel garnered deep appreciation for its beauty, even winning a treasured place in a number of crown jewels.

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 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.

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. Intense reds and pinks are caused by traces of chromium.

2023年8月24日 · Spinel is a mineral that belongs to the group of oxides and forms in various colors, making it a popular gemstone. Its chemical composition is magnesium aluminum oxide (MgAl2O4). Spinel crystals have an octahedral crystal structure and are often found as octahedral, rounded grains or as single crystals. Spinel octahedron from Morogoro, Tanzania.

Spinel is one of few gemstones that require no special treatments; its beautiful, vivid colors and clarity are entirely natural. Spinel is also excellent for use in jewelry because it is hard, tough, and often more affordable than ruby or sapphire.