Spinel specimens range from extraordinary crystals to beautifully cut stones. - Jeffrey Scovil, courtesy Barker & Co
The fashioned spinel is from Sri Lanka, while the rough crystals are from Myanmar. The second crystal from the right is an octahedron. The other crystals rotated during growth and appear flattened. Scientists call them twinned crystals.
Pink to red spinel is in high demand among gem connoisseurs. - Courtesy a Private Collector and Mona Lee Nesseth, Custom Estate Jewels
Spinel is a magnificent-but-rare stone that is durable enough to be worn in all types of jewelry. - Courtesy Thomas Baross
Figure 3. About five multiphase inclusions associated with colorless carbonate crystal are seen in the spinel’s center, shown using diffused brightfield illumination. Photo by Victoria Raynaud/GIA; field of view 2.40 mm.
Figure 2. The Star of David spinel hosts some interesting multiphase inclusions. Such fractured, thin crystals are very brittle; this one was damaged during the cleaning process. Photo by Sasithorn Engniwat/GIA.
Figure 1. This 12-sided crystal recently obtained in Mogok is a rare spinel macle, hosting fascinating multiphase (liquid + gas) inclusions. The stone is reportedly from the eastern part of the Mogok Valley. Photo by Victoria Raynaud/GIA; field of view 5.7 mm.
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