A while back, Kate Bosworth teamed with stylist Cher Coulter and quietly started a trendy, but affordable, jewelry line called JewelMint. Now, another celebrity is lending her name to the brand.

As part of JewelMint’s new charity initiative, Rachel Bilson has signed on as a celebrity guest curator. She has chosen a pair of gold-plated amethyst earrings—now dubbed the Rachel Earrings—which retail for $29.99. From April 15 to June 15, fifty-percent of the proceeds from their sale will be donated to the Invisible Children charity, an organization devoted to stopping children from becoming child fighters in Uganda. Rachel is excited about the collaboration and says:

Working with JewelMint to support such a worthy cause means so much to me.

Check it out and purchase your own pair of earrings at JewelMint.com