Suvarn Gufa (Golden Cave) is associated with Shatrunjay Tirth in Palitana, an important pilgrimage site in Jainism. According to Jain tradition, Suvarn Gufa is famous for housing a precious idol (ratn ni pratima). It is believed that there is one main ratna (jeweled) idol in Suvarn Gufa.

As per Jain legends and texts, this pratima was installed (bharavi) by Dharanendra Dev (the Nagraj or serpent deity and Yaksha associated with Lord Parshwanath). Dharanendra Dev is revered for protecting and serving Lord Parshwanath Bhagwan, the 23rd Tirthankara.

So, in summary:

• Number of ratn ni pratima: 1 (ek)
• Installed by: Dharanendra Dev

This information is based on Jain scriptures and oral tradition related to Shatrunjay Tirth and Suvarn Gufa.