Answer

Siddh Shila ka aakar aam taur par ardh-chandrama yani crescent moon jaisa bataya jata hai. Jain prateekon me ise upar ke hisse me ardh-chandrama ke roop me dikhaya jata hai, jo mukta aatmason ka nivas-sthan maana jata hai. ( jainpedia.org)

Explanation

Jain chitrankan aur Jain emblem me jo ardh-chandrama dikhai deta hai, woh Siddhashila ka pratik hai. Isi ke andar ya uske saath bindu mukta aatma ka sanket deta hai. ( jainpedia.org)

Spiritual Understanding

Siddhashila mukti aur param shanti ka sthaan hai. Iska ardh-chandrama roop humein yaad dilata hai ki aatma ka antim lakshya karm-bandhan se mukt hokar siddha avastha prapt karna hai. ( smarthistory.org)

Takeaway

Siddh Shila = ardh-chandrama jaisi. ( jainpedia.org)