Greetings to all my colleagues and readers of my page!
Friends, in this post we will touch on luminescence, specifically the fluorescence of minerals and rocks — when we illuminate a little stone with UV light and it glows in one or several shades. This effect fills many people with childlike delight, and that is perfectly normal.
But luminescence also has other interesting “subtypes” that are rarely discussed in simple terms. Below, we will briefly explore the main types.
✨ Fluorescence in Stones
📖 During fluorescence, electrons in a mineral, excited by incoming photons, move to a higher energy level. They remain there for a fraction of a second, then return to their original state and emit light — that bright “neon” glow under a UV lamp.
As soon as you switch off the UV torch, the fluorescent glow immediately disappears.
✨ Phosphorescence in Stones
📖 During phosphorescence, electrons remain in an excited state longer than they do during fluorescence. This means that phosphorescent minerals can continue glowing for a little while even after you switch off the UV light source — producing an “afterglow” effect.
Minerals that sometimes phosphoresce include calcite, celestite, colemanite, fluorite, sphalerite, and willemite.
✨ Thermoluminescence in Stones
📖 Thermoluminescence is a mineral’s ability to emit a small amount of light when heated. Heating typically involves temperatures between 50 and 200 degrees Celsius — far below the temperature at which a stone begins to glow red from heat.
Apatite, calcite, chlorophane, fluorite, lepidolite, scapolite, and some feldspars sometimes exhibit thermoluminescence. In everyday life, this is more often a subject for collectors and researchers than for ordinary practitioners, but it is useful to know about this effect.
✨ Triboluminescence in Stones
📖 Some minerals can emit light in response to mechanical energy: when they are struck, crushed, scratched, or broken. The glow occurs because bonds in the crystal lattice are disrupted and stored energy is released.
The amount of light is usually very small, so the effect is visible only in complete darkness and with careful observation. Minerals that sometimes exhibit triboluminescence include amblygonite, calcite, fluorite, lepidolite, pectolite, quartz, sphalerite, and some feldspars.
✨ Safety Precautions
📖 Remember that UV radiation is partially or completely imperceptible to the eye — we can hardly see it, but excessive exposure can cause burns and damage the skin and eyes, especially when working with powerful lamps. This can be compared to spending a very long time in strong sunlight without protection.
So protect your eyes: do not look directly into the light from a UV torch or lamp, wear protective glasses, and do not hold the light close to your skin for longer than is genuinely necessary.
Course Invitation
🎓 A Deep Dive into the World of Minerals
Would you like not only to admire stones, but also to use their magical power in your life? 🌙
🌠 Friends, colleagues, and esteemed practitioners, I invite you to my original course:
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In this course, we explore stone magic, the chemical composition and correspondences of more than 150 specimens in detail, including some of the rarest examples.
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© Andrey Rudenko
Mineral researcher, astrologer, and esoteric practitioner
