Uniqueness Guaranteed: Every item is one-of-a-kind, making them ideal for all projects or designs. This listing is for 1 egg. Avg Size Range: (55 to 60 millimeters) Sizes Vary Material Origin: (Mexico) Rainbow Obsidian is a naturally occurring volcanic glass that forms when lava cools rapidly. Its distinctive multicolored sheen is caused by the presence of microscopic magnetite crystals, which refract light in layers. This stone is known for its smooth texture and vibrant play of colors, typically ranging from deep black to flashes of green, blue, purple, and gold. It's a popular choice for jewelry, carvings, and ornamental objects. Custom Requests: Have specific preferences? Leave a message with your order, and we'll do our best to accommodate your requests if possible. Handmade items vary in size, shape, and color when selected randomly (the highest quality items are chosen first). They'll be as beautiful as those in the photos.