Gem
Srimad-Bhagavatam
SB Canto 3
SB 3.15.41, Translation:
His countenance was distinguished by cheeks that enhanced the beauty of His alligator-shaped pendants, which outshone lightning. His nose was prominent, and His head was covered with a gem-studded crown. A charming necklace hung between His stout arms, and His neck was adorned with the gem known by the name Kaustubha.