Judith Hill: crystals and cosmic rays

Medical astrologer Judith Hill on the Astrology Hub podcast: the Indian system of planetary gem remedies, the “cosmic colour ray” of each planet and what each stone is for — checked against gemmology, physics and the trials.

15 October 2026 17 min read ▶ 53-min video 22 sources · 3 peer-reviewed

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A table of nine planets with their colour rays and gems — ruby for the Sun, pearl for the Moon, emerald for Mercury, diamond for Venus, red coral for Mars, yellow sapphire for Jupiter, blue sapphire for Saturn, hessonite and cat's eye for the nodes — and what Judith Hill uses each for

In brief

Judith Hill teaches upāya, the Indian system of planetary gem remedies: each planet's “cosmic colour ray” is held in a stone — ruby for the Sun, pearl for the Moon, blue sapphire for Saturn — and worn, with great care, to strengthen a weak planet in the birth chart. The pairings are a genuine tradition; the physics is not. A gem's colour comes from the light it absorbs, so it cannot store or send out a ray, and the cosmic rays of physics are particles from space. No clinical trial supports planetary gem therapy, and the controlled studies of crystals find nothing beyond placebo. Wear a stone you love — but never in place of diagnosis or treatment.

9 planets in the gem system, each with its stone — from ruby for the Sun to cat's eye for the south node

~90% of the cosmic rays of physics are protons — particles, not colours About 9% are helium and heavier nuclei, about 1% electrons and positrons.

1912 the year Victor Hess discovered cosmic rays on balloon flights — a Nobel prize followed in 1936

0 clinical trials of planetary gem therapy we could find, for any of the conditions she names

Learn from the source

Judith Hill

Medical and vocational astrologer, herbalist and author of 14 books; founder of the Academy for Astrological Medicine.

She has practised astrology since she was 14 and medical astrology since 1983. Her Academy teaches all six branches of medical astrology, from surgery dates to herbs.

judithhillastrology.com ↗ academy4astrologicalmedicine.com ↗ Every summary of Judith Hill’s work →

Astrology Hub

Amanda Pua Walsh's podcast and school, where many of these teachers are interviewed.

Long conversations with working astrologers, Judith Hill among them, and workshops to go further.

astrologyhub.com ↗

Upāya: a planet's ray, held in a stone

Gems as planetary antidotes

For years, Judith Hill says, the gem lore she met as a medical astrologer was “never right enough for me”: turquoise is good for this, wear that for a broken heart, a stone for each Sun sign. Then she found a complete system from India — upāya, “planetary antidotes for problems you have in your birth chart”. Each planet is given a gem, and the gem is held to “capture and permanently project the cosmic colour ray” of that planet. If you need the planet, you wear its stone, put on for the first time on a chosen day and worn on a chosen finger. She studied every system of upāya she could find, compared them in one of her books, and believes she “probably taught the first classes in America”.

For members

Read the whole summary

7 sections, 3 diagrams, the video with its chapters, 28 claims checked against the research, 22 sources with the names of the people who did the work and links to it — and downloads in PDF, Word, Excel and PowerPoint.

🔒 Nine planets, nine rays
🔒 Where a gem's colour comes from
🔒 Two kinds of cosmic ray
🔒 What the stones are for
🔒 Her cases, checked
🔒 Learn from Judith Hill

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Judith Hill: crystals and cosmic rays

In brief

Learn from the source

Gems as planetary antidotes

Read the whole summary

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