Garnets are a group of silicates that have been used since the Bronze Age as gemstones and abrasives. Their name comes from the Latin word granatum, referring to the appearance and color of some garnets, which resemble the seeds of the pomegranate fruit (Punica granatum). Garnet chemistry is very complex. It is believed that there are series of intermediate chemical compositions between two extremes, which are considered the true species. A given specimen is named after the dominant species, or, if this is not known with certainty, after the series. Thus, we can have grossular, andradite, or a garnet of the grossular-andradite series.