These 9 gems are listed in the ancient Thai poem which translates
as, Good (quality) diamond, ruby, emerald, yellow sapphire,
gomeda, blue sapphire, Moon gem, red coral, and cats
eye. These are the 9 Gems.
Late great Thai astrologer Horacharn Thep Sarikabutr
has given the meaning of these nine gems in his Parichad-Jataka
(chapter 2, verse 21, pages 35-36 ) as follows:
Top quality and flawless ruby is the gem for
the Sun, natural pearl for the Moon, red coral for Mars,
emerald for Mercury, yellow sapphire for Jupiter, diamond
for Venus, blue sapphire for Saturn, hessonite for Rahu
(ascending lunar node), and cats eye for Ketu (descending
The Correct setting arrangement for these 9 gems is
shown in the illustration below. Ruby for the Sun is
always in the center, surrounded (clock wise from the
top) by diamond, natural pearl, red coral, hessonite,
blue sapphire, cats eye, yellow sapphire, and emerald.
no gem other than ruby or red spinel for the Sun is
set in the center of a nine gems arrangement. To do
so would be bad geomancy going against the flow of nature.
The Sun is the center of the solar system and therefore
the Suns gem is always positioned in the heart
of a Navaratna Astral Talisman.