Gemstone mining in hunza | Blue Light Gemstones
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The most colorful gemstones on Earth
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What processes in the depths of the Earth forge beautiful and precious stones? Catch "Treasures of the Earth: Gemstones," airing November 2, 2016 at 9 pm on PBS: http://to.pbs.org/2dMiqTB | NOVA l PBS
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𝗜𝗹𝘆𝗲𝘀 & 𝗕𝗶𝗹𝗮𝗹 | 𝗚𝗲𝗺𝘀𝘁𝗼𝗻𝗲𝘀 • 𝙁𝗶𝗻𝗲 𝗷𝗲𝘄𝗲𝗹𝗿𝘆 on Instagram: "Natural ruby ? But “natural” doesn’t always mean untreated — or valuable. Here’s what the tests revealed ⬇️ 🔍 Refractive Index 1.77 → exactly where corundum should be 🔍 Polariscope Blinking during rotation → doubly refractive → consistent with ruby ⚖️ Specific Gravity Calculated at 3.95 → slightly below typical natural ruby → first sign something might be off 🔬 Microscope Amphibole crystals → proof of natura
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