Crystal Balls?

Although this looks like Bunty and Steve are Obsidian Black crystal ball gazing, preparing to give Sue a psychic reading, black Obsidian is technically not a true crystal. It is, however, a form of igneous rock that can be classified as natural glass. What is igneous rock? It forms when hot, molten rock crystallises and then solidifies. No wonder they are holding them like hot potatoes.

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