Rahu (North Node) in Vedic astrology: meaning, signs, gem and mantra

Stands for
ambition, the foreign and unusual, technology, sudden change and illusion
Rules
No sign of its own
Exalted in
Vrishabha
Debilitated in
Vrishchika
Day
Saturday
Colour
smoky blue, grey
Gem
hessonite (gomed)
Mahadasha
18 years
Nakshatras it rules
Ardra, Swati, Shatabhisha
Mantra
ॐ राहवे नमः

Worship Durga or Bhairav; keep away from shortcuts and intoxicants.

Surya · Chandra · Mangal · Budh · Guru · Shukra · Shani · Rahu · Ketu