Shiva Purana
पद्ममष्टदलं हैमं नवरत्नैरलंकृतम् ॥ कर्णिकाकेशरोपेतमासनं परिकल्पयेत् ॥ २८ ॥
It is a golden lotus with eight petals and is adorned with nine gems. A seat should be arranged with earrings and hair.
english translation
padmamaSTadalaM haimaM navaratnairalaMkRtam ॥ karNikAkezaropetamAsanaM parikalpayet ॥ 28 ॥
hk transliteration by Sanscript