A customer's Gem Membership is tied to a single Jeweler, so their benefits will not apply when they are shopping with a different Jeweler.  However, every Jeweler has options for how they would like to address this situation. Many may choose to offer an alternative customer discount or refer the Gem Member back to their Jeweler. If the Jeweler opts to honor the Gem Member 20% off retail the Jeweler Cost will not adjust, so the Jeweler will not make 50% gross profit.