Free Gemstone Calculator

रत्न कैलकुलेटर

Find your recommended gemstone by Moon sign — with a substitute stone, metal, finger and day to wear it. All calculations happen in your browser; nothing you enter is sent anywhere.

A starting point only — see the Gemstones & Remedies guide and confirm with a full consultation before buying or wearing any stone.

Enter Your Birth Details

Date of Birth

Time of Birth

Birth City / Timezone

Moon Sign: 

Ruled by

Substitute stone:

Recommended metal:

Finger to wear:

Best day to wear:

This is based on Moon sign alone — the strongest recommendations factor in your Ascendant, house placements and current dashas too. Book a Gemstone Consultation to confirm the right stone, weight and setting for your chart.

Common Questions

FAQs — Gemstone Calculator

How does the gemstone calculator pick a stone?+

It uses your Moon sign (Rashi) — each of the 12 signs is ruled by a planet, and the calculator suggests that planet's classical gemstone along with a lower-risk substitute stone.

Should I wear a gemstone without consulting an astrologer first?+

It's not recommended. Gemstones are prescribed based on your full birth chart — the planet's placement, strength and the dashas running in your life — not the Moon sign alone. This tool is a starting point; a full consultation confirms whether a stone actually suits your chart before you buy or wear one.