There is magic in this crystal ball! An undrilled, perfectly round ball of rock crystal is referred to as a 'pool of light' because of the reflection of light they project on their immediate surroundings, creating a mystical glowing effect. This ring certainly has that characteristic, though technically, because it is not perfectly round, and instead a very tall cabochon, it is not a 'pool'of light'. It is, however, rock crystal, beautifully bezel-set in a unique 18k Gucci-link setting. The links are a flexible chain that fits a small range of sizes around 5. We can not resize this piece. The rock crystal stands 1/2 inch tall and 3/4 inch wide.