The word nava means ‘nine’ and ratna means ‘gem’ in the Sanskrit language. Navaratna or Navagraha Jewelry which has all the 9 stones representing the all 9 planets.One can get them set in gold or sliver.
All stones can be of same size.

Navaratna refers to the nine gemstones related to the nine planets used in Vedic astrology.

The Gem stones and their Planetary Representations are–

Ruby –Sun
Pearl —Moon
Red Coral —-Mars
Emerald —–Mercury
Yellow sapphire ——Jupiter
Diamond —–Venus
Blue sapphire —Saturn
Hessonite —Rahu, the ascending lunar node
Cat’s eye — Ketu, the descending lunar nodeIMG_3046


Ashtadatu-8 Metals

Ashtadhatu is widely used for making Rings and Idols of Gods and Goddesses ,as it is auspicious in Hinduism.Ashtadhatu means an alloy of 8 Metals ,i.e.  Gold, Silver, Copper, Zinc, Lead, Tin, Iron and Mercury.The eight metals are mixed in almost equal proportions. As per Indian Astrology to reduce the adverse effect of various planets different jewels are being used, same way to reduce the adverse effect of various planets different metals are being used.
Ashtadhatu Kada or Ring can be worn to serve the purpose.IMG_2753