You are looking at a large piece of natural Citrine, found and polished in Brazil. It had many rainbows inside, and a nice light yellow or golden color. The backside of the crystal is flat, as you can see on one of the pictures, and the front side is more wide. Because of its form this will make a great altar piece, by putting it with the back towards the wall the crystal can spread its lovely heart vibration through the house. When holding this crystal it cleanses the heart from stress, and brings a warm energy inside.