Thailand
Thai gold has its own standard — 96.5%, struck as “965” — a trade convention you'll see across Bangkok's baht-gold shops, distinct from the Western karat system.
In the atlas: Bangkok Silom & JTC
Voluntary marking
Thailand has no state assay office. Domestic “baht gold” trades at a fixed 96.5% purity by trade convention; the Gem and Jewelry Institute (GIT) added a voluntary hallmark in 2020.
No compulsory hallmarking; the 96.5% “Thai gold” convention is the signature.
What you'll see struck
965 · 96.5%
Thai baht gold (~23K)
The signature domestic standard — 96.5% pure gold — set by trade convention for baht-gold ornaments.
750 / 585
Export fineness
Western 18K/14K millesimal marks on pieces made for export.
925 · Thailand
Thai sterling silver
Sterling silver, often stamped with “THAILAND” (or, historically, “Siam Sterling”).
Fineness
- Gold
- 965 (96.5%, domestic) · 750 · 585
- Silver
- 925 (· 950 · 999)
Decode a mark you've found
Seen a number struck inside a piece? Read what it means, and how Thailand marks it.
Heading there to buy? These district buyer's guides show how to read a hallmark at the counter, what a fair price looks like, and how to spot a fake.
- Gem and jewelry testing services Verified
- Thai Industrial Standards catalogue Verified
* The precise legal basis of the 96.5% standard and the GIT laser-mark glyph are not confirmed in primary sources.
A reference guide, not an authentication service. Marks vary by date and metal; consult the relevant assay office or standards body for definitive identification.