मणिर्लुटति पादेन काच शिरसि धार्यते ।
यथैवास्तु तथैवास्तु काचः काचो मणिर्मणिहि ॥

Meaning:
A gem is trodden under foot and a glass is worn on the head. Even in that state a glass is glass and a gem is a gem.