Whether you’re buying gemstone jewelry for yourself or a loved one, there are a few things you should keep in mind while shopping. The “Four C’s” of diamond buying (carat, color, clarity, and cut) can be used for many gemstones as well. You will also want to keep in mind the differences between natural, lab-created, and imitation gemstones. Similarly, some gemstones are enhanced or treated. Wondering where to buy gemstones and related jewelry? Consider Johantgen Jewelers in the greater Minneapolis area. This local full service jewelery store located in Crystal has been family owned for over a 100 years.