“Bata Kumbala” is a centuries-old technique that improves transparency and changes the colors of precious stones if exposed to very high temperatures. In nature rare minerals originate through slow geological processes that are artificially recreated to purify second choice stones as most of the veins are almost depleted nowadays. These stone pieces are inspired by this and therefore, after being turned are also thermally treated up to 800° so that some hidden minerals become visible giving a whole different look and feeling to them.