Eastern or Hindu Astrology assigns gem stones based on the ruling planet. Note that in Eastern Astrology, the North and South Nodes of the Moon are treated with the same importance as a Planet in Western Astrology. In Western Astrology, the North and South nodes of the moon are used to determine where help (north) and trials (south) will come about.

SUN SIGN	PRIMARY GEMSTONE	SECONDARY GEMSTONE(s)
Aquarius, January 21-February 21, Ruled by Saturn	Sapphire	Indicolite, (Blue Tourmaline), Amethyst
Pisces, February 21-March 21, Ruled by Jupiter	Yellow Sapphire	Yellow Topaz, Citrine, Heliodore (Yellow Beryl)
Aries, March 21-April 20, Ruled by Mars	Coral	Carnelian, Bloodstone
Taurus, April 20-May 21, Ruled by Venus	Diamond	Rock Crystal (Quartz), White Zircon, White Topaz
Gemini, May 21-June 21, Ruled by Mercury	Emerald	Green Jade, Peridot, Green Tourmaline, Tsavorite (Garnet)
Cancer, June 21-July 21, Ruled by the Moon	Pearl	Moonstone
Leo, July 22-August 22, Ruled by the Sun	Ruby	Red Garnet, Rubellite (Red Tourmaline)
Virgo, August 22-September 22, Ruled by Mercury	Emerald	Green Jade, Peridot, Green Tourmaline, Tsavorite (Garnet)
Libra, September 22-October 23, Ruled by Venus	Diamond	Rock Crystal (Quartz), White Zircon, White Topaz
Scorpio, October 23-November 21, Ruled by Mars	Coral	Carnelian, Bloodstone
Sagitarius, November 21-December 21, Ruled by Jupiter	Yellow Sapphire	Yellow Topaz, Citrine, Heliodore (Yellow Beryl)
Capricorn, December 21-January 21, Ruled by Saturn	Sapphire	Indicolite (Blue Tourmaline), Amethyst
Moon's North Node, Ruled by Rahu	Hessonite (Orange Garnet)	Orange Zircon
Moon's South Node, Ruled by Ketu	Cat's Eye	N/A