Cobalt color “beach glass” necklace

Cobalt blue beach glass necklace3 cobalt blue and 2 opaque clear glass adorn a 9 inch necklace. I BELIEVE the necklace is sterling silver but cannot verify this as I cannot find any markings on the necklace identifying it as such. I have put a penny under various parts of this necklace so you can visualize the size. Summery necklace, which would look great with a white shirt and weathered blue jeans.