lrnit on Instagram: "​It looks like magic, but it’s actually pure physics! 💎☝️ ​A gem-cutting saw (or lapidary saw) uses a diamond-rimmed blade and a specific vibration or speed that relies on the difference between hard and soft materials. While it breezes through dense minerals and stones, your finger—which is soft and elastic—simply deforms or moves with the blade rather than being caught by it. ​It’s the ultimate lesson in material properties! 🧠✨ ​Why it works: ​Rigidity vs. Elasticity: Th