A world-famous diamond is spending some time in the Bay Area this week and San Francisco's first lady got to take it for a spin.
The Chrysanthemum diamond is a 104 carat stone.
It was found in South America in 1963.
It got its name from its color: brown.
The jewel has 189 facets and is on of the largest brown diamonds ever discovered.
Gavin Newsom's wife, Jennifer Siebel, wore the diamond Tuesday night to a holiday event hosted by the fine jewelry company S.H. Silver.