 Scholars such as Moriz Winternitz state that the authenticity of the surviving version of this document is doubtful because Shaiva celebrities such as Skanda and Agastya teach Vaishnavism ideas and the bhakti (devotional worship) of Rama, mixed in with a tourist guide about Shiva temples in Varanasi and other parts of India.Agastya is attributed to be the author of "Agastimata", a pre-10th century treatise about gems and diamonds, with chapters on the origins, qualities, testing and making jewellery from them.Several other Sanskrit texts on gems and lapidary are also credited to Agastya in the Indian traditions.