JWST NIRCam color image of the SPT-CL J0615−5746 cluster field (red: F115W + F150W, green: F200W + F277W, blue: F356W + F444W). The field of view is ﹩\sim 2\mathop{.}\limits{^{\prime} }3\times 2\mathop{.}\limits{^{\prime} }3﹩ and the image is shown with north up and east left. The z = 10.2 critical curve of our fiducial LENSTOOL-A model (see Section 4) is shown in gold. The location of the Cosmic Gems Arc is shown in the left-hand open white box, with a zoomed inset figure (8″ × 8″) outlining the galaxy with a red ellipse. The z = 10.2 critical curves of the LENSTOOL-A (gold), LENSTOOL-B (dark orange), GLAFIC (cyan), and WSLAP+ (magenta) lens models (described in Section 4) bisect the Cosmic Gems Arc. The right-hand open white box and zoomed inset (8″ × 8″) shows the candidate counterimage of the arc, which is located near (within 2﹩\mathop{.}\limits{^{\prime\prime} }﹩2) the position predicted by the lens models.