DeKalb County's Largest Jewelry & Coin Shop Sycamore Jewelry & Coin We buy gold, silver and diamonds! Full Service Jeweler 30% off already low prices on Diamond jewelry 216 W. State St., Sycamore | 815-991-9219 (Across street and west of DeKalb County Courthouse) DeKalb County's Largest Jewelry & Coin Shop Sycamore Jewelry & Coin We buy gold, silver and diamonds! Full Service Jeweler 30% off already low prices on Diamond jewelry 216 W. State St., Sycamore | 815-991-9219 (Across street and west of DeKalb County Courthouse)