Petchseeg Thai Co., LTD Diamonds & Jewelry

Shopping · Samphanthawong

River City Bangkok, 23 Soi Charoen Krung 24, Talat Noi, Samphanthawong, Bangkok 10100

Rated 5/5 from 14 reviews.

Data checked on 23 June 2026.

Petchseeg is not a browsing destination for casual shoppers. It is a manufacturer's showroom, and that distinction matters. If you arrive knowing what cut you want - rose, salt-and-pepper, French cut, or old mine - you will leave with better value and more transparency than almost any mall jeweller in Bangkok can offer. The River City address adds context: this is a building full of serious dealers, not department store counters.

River City Bangkok sits on the Chao Phraya riverfront at Charoen Krung Soi 24, an address that has housed antique dealers, art galleries, and specialist traders for decades. Petchseeg Thai occupies space inside that complex as a working manufacturer's showroom rather than a retail boutique. The company dates to 1996 and describes itself as one of the pioneers of rose-cut diamonds in Thailand, a claim backed by more than 28 years of continuous operation in a category that has since attracted significant global demand. Their stock covers an unusually broad range of non-standard cuts: rose cut, old cut, salt and pepper, slice, French cut, emerald cut, single cut, hole beads, and fancy shapes, alongside finished pieces in rings, earrings, brooches, bracelets, and pendants. All stones are described as natural and third-party certified. Thai artisans produce the finished jewelry in-house, and the company accepts custom commissions, including bespoke work using clients' own rough diamonds.\n\nThe business operates on both B2B and B2C terms. Buyers in over 25 countries have sourced from Petchseeg, which positions the showroom firmly in the mid-to-upper trade tier rather than the souvenir bracket. Collections include Navratna multi-gem sets, Peranakan-influenced pieces, and the Turquoise Royale line, each drawing on distinct regional craft traditions.\n\nPractical notes worth knowing. The showroom is open Monday through Friday, 9AM to 6:30PM, and Saturday until 4:30PM. It is closed on Sundays. Parking listed publicly is a free lot. Repair services are available on-site, and delivery is offered for those who cannot collect in person. First-time visitors attending the government-backed biannual Bangkok Gems and Jewelry Fair, held at the Queen Sirikit National Convention Center and organised by the Ministry of Commerce's Department of International Trade Promotion, will sometimes find Petchseeg represented there as well.\n\nRiver City is not easy to stumble across by accident. Plan the visit.