Nine Gems Belt
HM Queen Sirikit
A detailed look at the Nine Gems Belt
HRH Princess Sirindhorn wears it as a brooch

It is believed that the nine gems will bring happiness and luck to the wearer. By wearing one of the stones, the wearer will also benefit from its particular power. The gems and their beneficial powers are as follows:

Diamond
Power, wealth, success over enemies
Ruby
Success and longevity
Emerald
Strength and security
Yellow Sapphire
Charm and love
Garnet
Health and longevity
Blue Sapphire
Love and wealth
Pearl/ Moonstone
Purity, happiness, and success over enemies
Zircon/ Topaz
Wealth and success in legal affairs
Cat's Eye
Protection by spirits, and from fire

As a pendant