I would not be too sure about Lord Shiva being an exception!
Check this out..from Chandrasekhara Asthkam..Silver is mentioned as a figure of speech!
चन्द्रशेखर चन्द्रशेखर चन्द्रशेखर पाहिमाम् ।
चन्द्रशेखर चन्द्रशेखर चन्द्रशेखर रक्षमाम् ॥ १॥
रत्नसानुशरासनं रजतादिशृङ्गनिकेतनं
सिञ्जिनीकृतपन्नगेश्वरमच्युताननसायकम् ।
क्षिप्रदघपुरत्रयं त्रिदिवालयैभिवन्दितं
चन्द्रशेखरमाश्रये मम किं करिष्यति वै यमः ॥ २॥
Rathna Sanu Sarasanam, Rajathadri Srunga Nikethanam,
Sinchini Krutha Pannageswarachyuthahana Sayakam,
Kshipra Dhagdha Pura Thrayam Thri Divalayairabhi Vanditham,
Chandra Shekaramasraye Mama Kim Karishyathi Vai Yama
I seek refuge in him, who has the moon,Who made the mountain of jewels into his bow,Who resides on the mountain of silver,Who made the serpent Vasuki as rope,Who made Lord Vishnu as arrows,And quickly destroyed the three cities,And who is saluted by the three worlds,And so what can the God of Death do to me?