In Jainism, Moksha Siddheshila (the Siddha Shila) refers to the sacred seat/stone where a liberated soul (Siddha) resides after attaining Moksha. The important point is that Jain scriptures do not specify a universal material for this object. There is no canonical claim that the Moksha Siddheshila is made of quartz. The concept is spiritual and symbolic, and details like the exact material can vary by temple, tradition (Digambar vs. Shwetambar), and local worship practices. If a particular temple or sect teaches it as quartz, that would be a regional or decorative attribution, not a doctrinal requirement of Jainism.