Spinel Inclusions

The Importance of Inclusions in Gemology

Although a few gems contain beautiful inclusions visible to the naked eye, you’ll need a loupe or microscope to view inclusions in most gemstones, including spinels.

In general, inclusions can help answer many questions about their host gemstones. First and foremost, inclusions might provide clues for identifying a gemstone’s species. They may also help gemologists determine whether a particular specimen is natural or synthetic. In some cases, that may even indicate the source. Inclusions might also divulge if the host gem has received treatment or enhancement.

Natural Spinel Inclusions

The GIA classifies spinels as Type II clarity gemstones, which means they’re usually included. Although the highest-valued spinels are usually eye-clean, most spinels contain many kinds of inclusions visible only through magnification and some visible to the naked eye.