 And if you don't know what your gemstones are, their quality or their size, don't worry. That's actually pretty common. We've been the Four Corners' most trusted jewelry buyer for 35 years because we evaluate your gemstones, explain their value in plain English, and make you an offer. Bring your jewelry and gemstones in and let us make you an offer. Garcia & Company Jewelers in Farmington. The Four Corners' most trusted jewelry buyer since 1989.