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 …

A new birthstone with vivid colors that span the spectrum. Spinel has a spectacular luster, excellent durability, and is a gem of growing popularity.

Spinel belongs to the cubic crystal system and its characteristic crystal shape is an octahedron, which looks like two back-to-back pyramids. Like ruby, spinel is found in alluvial deposits; it …

May 29, 2024 · Spinel has often been confused for ruby or sapphire. But this durable gemstone, which is rarer than a diamond, is gaining popularity due to its color, durability, and more …

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 …

Aug 2, 2021 · The spinel gemstone is as beautiful as ruby, but with an intriguing history. Learn how it makes the perfect choice for jewelry, collecting, and more.

Jun 18, 2025 · But spinel is a gem in its own right, with unique properties, vibrant colors, and a fascinating backstory. In this guide, we’ll explore the meaning behind spinel, its physical and …

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 …

Mar 28, 2025 · Spinel is a magnesium aluminum oxide (MgAl₂O₄) that forms in metamorphic and igneous rocks. It crystallizes in high-temperature environments, often alongside rubies and …

Normal spinel structures have oxygen ions closely approximating a cubic close-packed latice with eight tetrahedral and four octahedral sites per formula unit (but eight times as many per unit …