Rock crystal is a colorless quartz and named from Greek for ice, ‘krystallos’. Over the centuries it has been used for a multitude of uses, such as glazing for memento mori and jewels enclosing hair, time pieces, orbs or ‘pools of light’, and even as diamond simulants. Georgian jewelers commonly created rivière of silver backed cushion-shaped rock crystal in collet settings. They would often paint a black dot on the culet to simulate the scintillation or flashes of light and dark in natural diamonds. These are often referred to Stuart crystals and black-dot rock crystal. Few survive today as many were sacrificed to different war efforts throughout history. We are delighted to be able to offer such a well-preserved example.