How do you know if your crystal is fake or real?

To determine if a crystal is real or fake, you can perform a few simple tests. First, check for bubbles or imperfections; real crystals often have natural inclusions, while fake ones, especially glass, may have bubbles. Additionally, you can use a scratch test—real crystals are generally harder and won't scratch easily, while softer materials will. Lastly, observe the weight; genuine crystals are typically heavier than their synthetic counterparts.