Blue Agate Slices by Weight. Unique blue agate pieces in blue tones, originating from Brazil and polished on both sides, giving them an intense shine. The image shown has been taken against the light to appreciate the veins and transparency of the slices. These blue agate slices come in various sizes and shapes, please refer to the guide table to choose the slices according to their weight. Approximate measurements: Approximate weight: Diameter: 50 grams between 6 cm and 8 cm 75 grams between 8 cm and 9 cm 100 grams between 9 cm and 10 cm 125 grams between 10 cm and 12 cm 150 grams between 12 cm and 13 cm 175 grams between 13 cm and 15 cm 200 grams between 15 cm and 16 cm The image shows the general quality of the item, you will receive a similar piece according to the weight you have selected.