Gem Cutting in Our Own Factories in Thailand

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Our expertise is exclusively dedicated to working with our own rough materials, ensuring consistency in quality and precision. At this stage, we do not take private requests, focusing instead on our own production.

The cutting of gemstones like emeralds, rubies, and sapphires requires a careful, multi-step process to enhance their natural qualities while minimizing material loss.

Before cutting begins, rough gemstones are sorted based on their color, clarity, size, and shape potential. Skilled workers analyze each stone to determine the best way to cut it for optimal yield and brilliance.

A specialist marks the rough stone, identifying inclusion-free areas and determining the best orientation for cutting. This step is crucial for minimizing weight loss while maximizing clarity and color.

For certain gemstones, particularly larger rough stones, a precision saw is used to divide the material into workable sections. Rubies and sapphires, which belong to the corundum family, are extremely hard and require diamond-coated blades for cutting. Emeralds, being more fragile due to natural inclusions, are handled with even greater care.

Once divided, the rough stone is shaped using grinding tools. This step, known as preforming, establishes the basic outline of the final gemstone. The artisan determines whether the stone will be cut into an oval, cushion, round, or other shape, depending on the rough material’s natural characteristics.

Faceting is the most critical stage, where the gemstone starts to come to life. The cutter applies carefully measured facets using a spinning lap coated with diamond powder. The angle and symmetry of the facets must be perfect to enhance the gem’s light reflection and brilliance.

For sapphires and rubies, traditional step or brilliant cuts are often applied to bring out their intense color.

For emeralds, the classic emerald cut (a rectangular step cut) is preferred to minimize stress on the stone and protect it from fractures.

Once the faceting is complete, the stone is meticulously polished to remove any surface abrasions and bring out its maximum luster. A polishing wheel with fine diamond abrasives is used for this step, ensuring a smooth, mirror-like finish.

Each gemstone undergoes strict quality control, where trained specialists examine color consistency, clarity, and facet alignment. If the gemstone is part of a calibrated series, it is measured precisely to match predetermined size requirements.

At GemMatrix, we only cut gemstones sourced from our own rough materials. This allows us to maintain high standards of quality, ethical sourcing, and consistency across our production.

We do not take private cutting requests at this time and exclusively work with Mozambique rubies, Australian - and other sources - sapphires (Nigeria, Sri Lanka, Madagascar...), and Brazilian emeralds.

Other semi-precious stones are available upon requests such as London Blue topaz, aquamarine, citrine, tourmaline, red garnets...

By managing every step of the process, from rough selection to expert sorting by our certified gemologists, we ensure that every gemstone meets our exacting standards while preserving the craftsmanship that defines Thai gem cutting.