The figure was made public when the NACC published the assets and liabilities of members of the Yingluck Shinawatra cabinet, following the swearing in of new members on June 30.
Ms Yingluck recorded B628.6 million in assets and B27 million in liabilities putting her B601 million into the black.
Apart from cash, land, buildings and vehicles, Ms Yingluck owns 73 items of “personal accessories”, 57 of which are assorted pieces of jewellery totaling B41.78 million baht, with a four-karat diamond ring worth B2.3 million being the most valuable.
She also has nine wristwatches of different brands including Rolex, Cartier and Patek Philippe, worth a combined B1.81 million, while her seven most expensive handbags all are made by Hermes, and together worth B2.1 million.
The NACC report also showed Ms Yingluck possesses 12 items of jewelled ornaments, each of them worth more than one million baht. The most expensive item is a 13.5-karat diamond pendant worth 7.7 million baht.
The PM is, however, a long way behind Deputy Prime Minister Pongthep Thepkanchana in the overall wealth stakes. His listed assets total B3.09 billion more than his liabilities - making him roughly five times richer than the PM in terms of declared assets.