The clasp is a Czech Glass button encased in sterling silver. Nobody is making these clasps anymore because they are too expensive to do, but I have a few left in my collection. The navy tiger eye has subtle strands of sable brown through out each bead. I can imagine this with a camel cashmere sweater and jeans. Or a navy sweater with brown suede pants. I know you have something like this. Here is the necklace to go with your wardrobe.