Can this be a snake egg or bird's egg on my garden

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I have found an egg on the top of the soil in my garden. It's the second time but the first time i was not able to take a picture of it. This time i took a picture. I was giving water to my Eugenia plant and found under the leaves that looks like a white ball. I'm not so sure if this is a snake egg or bird egg. I crushed it immediately after taking a picture. Hopefully there's no more egg hiding under it. The picture above is an egg cut half. You can see some black something in it. Below is just a rock. In case you can't tell which is the egg on the picture. This plant came from a garden farm h that sells different plants. So i was thinking because it was rice field areas turned into garden plant.