Inner circumference approximately 16.5cm The first to third photos were taken outdoors on a sunny day. The bright colors when exposed to sunlight and the elegant reddish-purple indoors. This is a wonderful garnet with various expressions♡ Red garnets tend to have a dark, blackish impression, but this is a high-quality piece with the beautiful purplish color unique to rhodolite garnet. When held up to the light, the reddish-purple color is even more prominent. As it is a natural stone, there may be cracks and inclusions. Please purchase only if you understand this.