From astrological point of


From astrological point of view there are certain gemstones that should not be worn together.

Gemstones Ruling Planet Anti-Gemstones
Ruby Sun Diamond, Garnet, Blue Sapphire
Pearl Moon Garnet
Coral Mars Diamond, Garnet, Blue Sapphire
Emerald Mercury
Yellow Sapphire Jupiter Blue Sapphire, Diamond
Diamond Venus Ruby, Yellow Sapphire, Coral
Blue Sapphire Saturn Ruby, Yellow Sapphire, Coral
Garnet Dragon’s Head (Rahu) Ruby, Coral, Pearl
Cat’s Eye Dragon’s Tail (Ketu)

I hope this answers your question.