Grossular-Andradite

A fantastic specimen showcasing a dense cluster of incredibly gemmy Mali garnets with intense luster and appealing color. Discovered in the mid-1990s, Mali's garnet deposits remain one of the few significant sources of gem-quality grossular-andradite material in the world. This specimen offers higher translucence and quality than the bulk of raw Mali garnets on the market today, as most gem-grade material is cut & faceted into gemstones. This thumbnail-sized specimen (16mm) luckily doesn't meet the requirements for faceting, while still showcasing the more high grade end of the spectrum. Chemically, Mali garnets fall within the grossular-andradite series, meaning each crystal is a solid solution between these two end members. Traditionally, mineralogists grouped grossular and andradite (along with uvarovite) into a subdivision called the ugrandites, paired against the pyralspites—pyrope, almandine, and spessartine. For decades this two-series framework was the standard way to make sense of the garnet group's chemistry. In recent years, however, the field has moved away from this tidy split. Modern research has revealed extensive solid solution and compositional overlap that the old binary system simply can't accommodate, and contemporary classifications now recognize a more nuanced web of relationships among garnet species.