Slow light in stone — the mineral kingdom's answer to the chakras.
Crystals are the mineral kingdom's most ordered form — atoms locked into lattices so regular they grow into geometric solids over geologic time. The metaphysical tradition reads that order as a kind of frequency, each stone carrying a stable signature that can be worked with: to ground, to open the heart, to sharpen the mind, to protect. Whatever one makes of the mechanism, the practice is old and coherent, and it slots cleanly into the correspondence grid the rest of the vault already runs on — every stone answers to a chakra, a classical element, and a planet or sign of Astrology.
The Stones
| Stone |
Chakra |
Element |
Planet / Zodiac |
Mohs |
| Amethyst |
Third Eye (Ajna), Crown |
Air |
Jupiter, Neptune / Pisces, Aquarius |
7 |
| Aquamarine |
Throat (Vishuddha) |
Water |
Neptune / Pisces (March birthstone) |
7.5–8 |
| Aventurine |
Heart (Anahata) |
Earth |
Venus, Mercury / Aries, Leo |
7 |
| Black Tourmaline |
Root (Muladhara) |
Earth |
Saturn / Capricorn |
7–7.5 |
| Bloodstone |
Root (Muladhara), Heart (Anahata) |
Fire |
Mars / Aries, Pisces |
6.5–7 |
| Carnelian |
Sacral (Svadhisthana) |
Fire |
Mars, Sun / Aries, Leo |
6.5–7 |
| Citrine |
Solar Plexus (Manipura) |
Fire |
Sun / Leo |
7 |
| Clear Quartz |
Crown (Sahasrara), all |
All |
The Sun / all signs |
7 |
| Fluorite |
Third Eye (Ajna), Heart |
Air |
Mercury / Capricorn, Pisces |
4 |
| Garnet |
Root (Muladhara), Sacral (Svadhisthana) |
Fire |
Mars / Leo, Scorpio, Aquarius |
6.5–7.5 |
| Hematite |
Root (Muladhara) |
Earth |
Mars, Saturn / Aries, Aquarius |
5–6 |
| Kyanite |
Throat (Vishuddha), Third Eye (Ajna) |
Air |
Neptune / Aries, Taurus, Libra |
4.5–7 |
| Labradorite |
Third Eye (Ajna), Throat |
Water |
Uranus / Leo, Scorpio |
6–6.5 |
| Lapis Lazuli |
Third Eye (Ajna), Throat |
Air |
Jupiter, Venus / Sagittarius |
5–6 |
| Malachite |
Heart (Anahata) |
Earth |
Venus / Capricorn, Scorpio |
3.5–4 |
| Moonstone |
Crown (Sahasrara), Sacral (Svadhisthana) |
Water |
Moon / Cancer |
6–6.5 |
| Obsidian |
Root (Muladhara) |
Fire / Earth |
Saturn, Pluto / Scorpio |
5–6 |
| Pyrite |
Solar Plexus (Manipura) |
Fire / Earth |
Sun, Mars / Leo |
6–6.5 |
| Rhodonite |
Heart (Anahata) |
Earth |
Venus, Mars / Taurus |
5.5–6.5 |
| Rose Quartz |
Heart (Anahata) |
Water |
Venus / Taurus, Libra |
7 |
| Selenite |
Crown (Sahasrara) |
Air |
Moon / Taurus |
2 (very soft) |
| Smoky Quartz |
Root (Muladhara) |
Earth |
Saturn / Capricorn, Scorpio |
7 |
| Sodalite |
Throat (Vishuddha), Third Eye (Ajna) |
Air |
Jupiter / Sagittarius |
5.5–6 |
| Tiger's Eye |
Solar Plexus (Manipura) |
Fire / Earth |
Sun, Mars / Leo, Capricorn |
7 |
| Turquoise |
Throat (Vishuddha) |
Air |
Venus, Neptune / Sagittarius, Scorpio |
5–6 |
