5h • 💎Crystals
differences
When these stones are tumbled and polished, their structural differences (like ridges or cracks) are smoothed away, making them look even more similar. To tell them apart in a polished state, you have to look for light reflection and weight:
- Black Obsidian: Look for a "mirror" finish. Because it is volcanic glass, it is the most reflective of the bunch. If you hold it up to a very strong light, the thin edges might appear slightly translucent or smoky.
- Black Onyx: It has a "dense" look. While polished onyx is shiny, it is completely opaque and lacks the deep, watery depth of Obsidian. The reflection on the surface will look more "flat" and solid.
- Black Tourmaline: Even when polished, you can often see tiny "fissures" or thin, needle-like lines just under the surface. It rarely looks perfectly flawless compared to the others.
- Hematite: This is the "heavy hitter." It will feel much colder to the touch and significantly heavier in your palm than the others. Its polish isn't deep black; it's a "gunmetal" or metallic chrome.
- Shungite: Polished shungite has a unique, slightly "greier" or more muted black than Onyx. It is also surprisingly lightweight—much lighter than it looks.
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differences
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