What is her diamonds rob thomas?

Her Diamonds is a song by American musician and songwriter Rob Thomas. It was released as the lead single from his second solo album 'Cradlesong' in 2009. The song is about Thomas' wife Marisol Maldonado, who was diagnosed with an autoimmune disease that causes chronic fatigue and muscle weakness. The title 'Her Diamonds' refers to Maldonado's tears, which Thomas compares to diamonds. The song received generally positive reviews and peaked at number 23 on the Billboard Hot 100 chart.