Coleman Co. was a South Dakota based jewelry company that manufactured Black Hills gold jewelry featuring the style of leaves, flowers and grapes common to the regional style. They closed in 2017. This pendant is a wonderful example of their style. It is hallmarked “C.CO”, “STER” (sterling silver), and “12K” (12k gold). Green, pink, and purple stones. Length: 1 1/3” Weight: 8 grams I am a trusted seller and I ship fast.