This book is considered a very important document, which reveals to us the beginning of the Arabs' work in the science of jewels and its characteristics, and their classification in it; In addition to what is unique to it from valuable civilized information, related to the trade of jewels from pearls and stones, and the pearls and their methods in its reputation, and from a distinct scientific method from other books that specialized in this; Because (Ibn Masoye) was the head of the official translators of the translators of his time, and one of the flags of medicine and authorship, not to mention being the chief physician of the Abbasid caliphs in the third century AH