Thank you for viewing these 20 natural glass nuggets, approximately 1.2-1.39 cm in diameter. These are natural glass nuggets. There are 20 nuggets, each approximately 1.2-1.39 cm in diameter. Some may contain small air bubbles. Please refrain from purchasing if you are concerned about this. If you wish to purchase multiple items, please let us know in advance. We will offer a discount based on the quantity and relist them as a combined order.