Spinel, MgAl 2 O 4 (download cif), is a rare gemstone that was used to imitate rubies. The structure has face-centered cubic symmetry, and is a little heavy to understand. The general formula is AB 2 ...

The gemstone spinel, known for its vibrant colors resembling gems such as rubies and sapphires, has now been shown to be ...

The vivid red color in these spinel specimens from Myanmar equals the finest red color in any gem. - © GIA & Tino Hammid Spinel is generally highly sought after by ...

Pink to red spinel is in high demand among gem connoisseurs. - Courtesy a Private Collector and Mona Lee Nesseth, Custom Estate Jewels Spinel, like garnet and diamond, is singly refractive, with the ...

Jane Taylor - One of a Kind 14K Yellow Gold Heart Burst Cocktail Ring with Tourmaline; Spinel and Diamonds - Pink - US 7.75 - Only At Moda Operandi - Gifts For Her This product detail is provided by ...