Who are we?

K.V. Gems is a labor of love and appreciative passion for precious and semi-precious gemstones. Established by Mr. Joseph Thomas Belmont and Mrs. Pirapan Belmont in 1984, their vision is now shared by more than 50 staff in what remains a family-run business. We specialize in the highest quality, unheated natural gemstones, working directly with the world’s leading suppliers and buyers.

Our inventory takes in Sapphire, Ruby, and Spinel, as well as semi-precious stones. We take pride in working with and for our valued clients to source exactly what they desire for their high-end jewelry designs and collections.



For more than 30 years, we have committed ourselves to ensuring a highly selective inventory and to investing in long-term relationships.
K.V. Gems was established in Bangkok in 1984 by Joseph Belmont, an American precious gemstone trader, and Pirapan Belmont, a gemstone wholesaler hailing from Thailand’s historic gemstone mining town of Chantaburi. Two defining commitments brought them together in business.

The first was to source a truly selective inventory of only the highest quality, mined unheated gemstones.

The second commitment was to grow their business based on the nurturing of long-term, personalised relationships with both suppliers and clients. For more than 30 years, these relationships have been built on a solid foundation of trust and integrity.

These two founding commitments have remained unchanged over the decades. They have been the basis for providing unhindered access to production outputs, allowing us to make buying decisions ahead of the market. They have also allowed our enviable inventory of unheated gemstones to satisfy the particular tastes of gem connoisseurs from around the world, who have come to rely on us for their collections.

As a result, our family-run business has differentiated itself within a highly competitive global gems market. Today, K.V. Gems is still headquartered in Bangkok – considered to be the world’s leading cutting and trading hub for gemstones – and employs more than 50 staff.


Our relationship with suppliers in the world’s leading gem-producing countries allows us to source natural, unheated gemstones first-hand, and to see production outputs ahead of the market.
K.V. Gems has suppliers and buyers based in mining areas around the world; our gems are sourced mainly from Myanmar, Sri Lanka, Vietnam, Madagascar, and Mozambique.

Every gem is hand selected and we choose only the cleanest and most evenly colored gemstones. We concentrate our sourcing efforts on our niche attention to unheated gemstones.

We are based centrally in the gemstone and diamond district of Bangkok, affording us to keep on top of what is circulating in the market and abreast of the buyers and sellers of various gems. This allows us to fulfill specific requests from our customers should their order be outside of our selective inventory.

We certify all our stones with the most reputable gemological laboratories in the industry, such as GRS, GIA, Gublin, and SSEF. This ensures authenticity and accuracy of geographic location and treatments, while instilling confidence in, and increasing the value of, our gemstones.


Gemstone cutting is an art form, a science, and a passionate discipline. The careful planning and execution of our cutting process enhances color, clarity and shape while retaining the most weight possible.

Our main cutting facility concentrates on re-cutting larger gemstones; we prioritize the retention of weight while enhancing the color, clarity and shape of our gemstones. 

Our second cutting factory is highly mechanized, and is expanding to utilize advanced technology of lasers and robotics, which can cut to the precision of microns. Currently, we produce highly symmetrical facets and exacting proportions for melee gemstones in the size range of 0.8 – 3.5mm.

We tailor our cuts to the needs of our customers.



Our sorting process is impeccably prepared to give us the very finest selections for our inventory. Our process gives us a competitive advantage in the market and saves our clients much time and effort.

Sorting is an integral part of the triangle, along with our cutting and sourcing operations, and quality control is paramount. Highly trained, experienced sorting staff work with the purchasing department to ensure the finest selections.

The sorting department is also responsible for finding the right gemstones for very particular and elaborate jewelry designs sought by our clients, while also creating beautiful layouts and pairs so that our customers can work with pre-existing suites. Uniform lots, parcels and sets are also created.



(662) 233-3964
 (662) 237-2076
 Google Maps


KV Gems Co., Ltd.
388 Sita building, Room 608-609
Mahaesak Road, Suriyawong,
Bangrak Bangkok,Thailand 10500

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