The two friends are collaborating on designs sold through a members-only club found at jewelmint.com. For a $29.99 monthly fee, subscribers get to pick a single item from a virtual library of jewelry to be sent to their home each month. The social-media-savvy site also allows friends to weigh in on subscribers' jewelry selections through Facebook and Twitter.
StyleList caught up with the ladies to talk baubles and Bosworth's designing instincts.
StyleList: How long have you two been talking about doing a collection together?
Kate Bosworth: Working together on this collection is a natural progression of our relationship. We've been best friends for nearly 10 years now and working together for almost five years. We have a real shorthand professionally and a harmonious balance when it comes to style.
Cher Coulter: We always thought about apparel, but then it seemed overwhelming. I studied fashion at Central Saint Martins and had my own clothing line for eight years, so I knew that a line was a lot of work. Jewelry seemed more spontaneous and rewarding.
StyleList: Do you have a philosophy when it comes to wearing jewelry?
K.B.: As long as it's an expression of your personal style and you feel confident, it's right. Personally, I can feel quite classic and minimalist during the day and at night feel more daring and rebellious. Jewelry really completes a style and it's versatile and fun to play with.
C.C.: I don't have any philosophies that I stick to 100 percent, but in general, I don't like to see large pieces worn all together -- a big necklace, big rings, big bracelets, etc. Right now, I love the punk-inspired idea of wearing lots of little cocktail rings across one's fingers for evening or multiple piercings and earrings.
StyleList: What were your first memories of jewelry as children?
K.B.: My mother still has bite marks on a gold locket she's worn ever since I was a baby. When I was first teething, I would get a lot of satisfaction in literally chewing her locket. The teeth marks remain!
C.C.: As a teen in the '80s, I loaded on cheap, dangly earrings and plastic bracelets. Then as I got more into art, I definitely became more hippie, with lots of friendship bracelets.
K.B.: Anything given to me by my family is really most special to me. My mother gave me the sapphire sweet-16 ring that was given to her from her mother. My father's mother left me a beautiful diamond bow ring from early 1900s that I love and wear today. Whenever I'm wearing pieces given to me by loved ones, I always feel they're near.
C.C.: I received a Gucci watch for my 21st birthday with the classic red-and-green stripe. It had a men's face that was bigger and that's still so cool now. It was stolen in a break-in when I lived in L.A., so I searched for the exact same one and found it on eBay. So fantastic!
StyleList: Have any of the JewelMint pieces been inspired by pieces in your personal collections?
K.B.: Some pieces found in our collection have been inspired by bits Cher and I have found in vintage markets. And I recently took a trip back to Boston, where my parents reside, and raided my mom's costume jewelry from the '70s and brought a lot of it back with me for inspiration! I am constantly inspired by environment, by a mood, by a person. Recently, I was traveling around Sweden and hunted through antique markets for pieces to bring back to Cher. And we now have a pair of earrings in our February collection that were inspired by a silver pin found in Gothenburg.
C.C.: Each piece has been inspired by something Kate and I have experienced firsthand, and it's always fun to see what that inspiration evolves into. I got my inspiration for the Charleston earrings in our December collection from a pair of Deco-style earrings I found shopping at a church sale with my mum in the Cotswolds of England's countryside.
StyleList: Kate, you don't have a traditional background as a designer. Where do you feel the instinct to do this collection comes from?
K.B.: I have a sincere love for fashion, as both my grandfather and father worked in retail. And professionally, costume and fashion is what often gives me an understanding of my characters. I have a strong aesthetic sense for JewelMint and I believe that's an important component to this creative process. But to be honest, I have way too much respect for my designer friends to call myself a designer at this point!
Meanwhile, check out this roundup of Kate's best style moments.