Jewellery Manufacturing Process

Every piece of jewelry begins with inspiration. Jewelry designers draw motivation from various sources. One primary source is understanding the desires and needs of the intended user. Another approach is to embrace current market trends and fashion by expanding on popular themes. Lastly, a more free-spirited method involves creating from the heart, where the designer’s personal dreams, along with the materials and gemstones, guide the design process.

From the perspective of a purist in jewellery design, we could let our imagination run wild and create free-spirited themes as they come to us. However, in practice, we must consider a wide range of factors, including user desires, jewellery manufacturing constraints, design elements, gemstone characteristics, jewellery styling, and material costs.

The design process requires functional knowledge of metallurgy and design principles to achieve multiple goals simultaneously. The setting must securely hold the gems in place, showcase both the dazzling gemstone and the metal, withstand wear, protect the stone, and harmonize with the overall aesthetics of the piece. Accent gemstones can be incorporated into the jewellery to add an extra touch of sparkle and glamour. The ring shank can influence both the appearance of the ring and how it feels to the wearer. Details in precious metals, such as milgrain and filigree, are excellent ways to add interest and embellishment to your jewellery. Finishing touches can significantly influence the overall look, giving it either a contemporary or vintage appearance.

Once a theme, value, and target user are established, the artist can work within reasonable boundaries, unleashing their talents and passion. With a set theme and clear parameters on materials, it becomes possible to design jewellery that confidently reflects the desired mood or emotion. The pleasure and challenge of including each element in a piece of jewellery lies in finding the balance among the various factors involved.

For our design team, this process begins with a detailed colour painting or a simple basic sketch to serve as a guideline. Our CAD designer will then create a comprehensive computer rendering using CAD jewellery design software, allowing us to view the jewellery from every angle and ensuring that the designs match our original vision.

Historically, jewellery design has relied on hand-drawn sketches and hand-carved wax models. While some designers still use these methods, 3D printers, CAM (computer-aided manufacturing), and CAD (computer-aided design) programs have significantly simplified the design process and reduced the time required to produce prototypes. CAD programs enable designers to create new and unique designs far more easily than with traditional pencil and paper. With premade settings designed specifically for jewellery makers, efficiency increases as standardized parts of a design can be reused or modified. These premade settings may include commonly used elements, such as basic ring shapes, gemstone settings, scrollwork, filigree, and vines.

Our jewellery model can come to life using two CAM methods: CNC mills and 3D printers. CNC milling machines carve a jewellery model from a wax block, using sharp, rotating tools or cutters to remove unnecessary parts. This milling process is subtractive, as opposed to the additive method used in 3D printing. In the 3D printing process, a wax-like resin serves as the printing material, printing layer by layer to create a piece and its attached supports and wax sprues. After printing, models can be used in the lost wax casting process, which is traditionally preferred by our jewellery manufacturing team. This rapid model printing makes mass-producing a design much easier.

With CAD jewellery design, we can evaluate manufacturing costs to meet the customer’s budget without requiring actual production. If the price point proves too high, we can adjust the dimensions, materials, or both until the target is reached. Consequently, this allows for better decision-making before carving the jewellery model, something that is much harder to achieve with traditional handcraft techniques.

Once the design is finalized, the jewellery manufacturing process begins with creating a wax model that captures all the fine details. This is accomplished using a computer-aided wax-making machine. The computer file of the 3D model is either transferred to a milling machine to cut out the wax model or sent to a 3D printer to produce a replica of the jewellery. The resulting wax model can be mathematically precise, providing a mechanical feel.

Carving is a crucial step in achieving a more organic design that highlights the vibrant curves of natural forms and the softer sensibility of the jewellery. In the moulding department, skilled artisans use traditional techniques to hand-carve intricate dimensional details, transforming the rough wax mold into a finely crafted version that advanced technology cannot replicate.

The finely carved wax is embedded in a metal cylinder, which is then filled with a plaster-like investment and left to harden. After the mold has hardened, it is heated in an oven at extremely high temperatures to burn away any traces of wax, leaving a hollow impression of the jewelry shape in the hardened investment. This space is subsequently filled with silver, creating a duplicate of the original wax design, known as the silver master model.

To achieve the ultimate beauty of a fine piece, the details and expressions created in the carving must be preserved in the silver master model, which serves as the foundation for the entire process. Our model makers are skilled metal smiths capable of crafting intricate vintage elements on the silver master model, adding uniqueness and distinction to marcasite jewelry.

A key consideration during the jewelry manufacturing process is that the scale of the piece will slightly shrink depending on the materials used. Therefore, the model maker needs to ensure that the original wax model is slightly larger than the desired final size. This adjustment is crucial to ensure that the setting and the ring, for instance, will be the correct size after the shrinkage occurs, allowing for a proper fit for both the stone and the finger.

The silver master model is packed into a thick layer of special mold rubber and compressed under high heat and pressure until it forms a solid block. This process ensures that the rubber molds perfectly around the master model, creating an accurate three-dimensional impression of the jewelry piece. After that, the rubber is cut in half to remove the silver master. The two halves of the rubber mold are then reassembled, resulting in a rubber mold that can be used to create thousands of wax replicas for mass production.

Before injecting wax into the rubber mold, it is essential to clean the mold cavities using an air gun or a soft-bristled brush. The wax injector must also apply a mold-release product, such as talcum powder, to create an airway opening. The use of powder is necessary as it helps keep the parts of the rubber mold separate, ensuring that all the air can escape and that the injected wax fills every crevice of the mold completely. Following these cleaning and maintenance steps will facilitate the easy removal of the wax from the rubber molds.

Next, hot wax can be injected through an opening in the rubber mold to fill the jewelry-shaped space, resulting in a wax reproduction of the master model. By using our vacuum wax injectors, we achieve excellent results. Once the wax has hardened, it can be removed and inspected for quality, revealing any flaws within the rubber mold. Each wax model must be examined with a 10x magnifying loop. After a wax model has passed through the quality control process, it is time to attach it to a small wax tree.

The technicians need to evaluate several parameters before setting up the wax on the tree, including the correct position and orientation of the sprue, the best angle for attaching the wax to the tree, and the optimal temperature for casting the jewelry pieces. Multiple wax models can be connected to form what is called a wax tree, which can then be placed in a cylinder mold. Creating a wax tree allows the jeweler to cast several pieces of jewelry simultaneously. The wax models are connected to a sprue, which is a thick, straight wax rod that will ultimately form a channel for the molten metal to enter the mold. Once the tree is completed and all the wax jewelry models are attached, it is ready for the ‘lost wax casting’ process.

The wax tree will be placed into a metal cylinder, known as a flask, into which a plaster substance made from investment powder and water is poured to create the molds. The flask containing the wax models is then placed in an extremely hot oven overnight, ensuring that the detail of the wax pieces is captured in the mold as the wax is absorbed. The quality of the wax is one of the most underrated aspects of the casting process. Any defects in the wax, such as distortion or internal air bubbles, can significantly affect the casting results. Our mold cutters and wax injectors work closely together to ensure that every mold functions perfectly, producing the finest wax possible.

After the wax tree is placed inside a metal cylinder, known as a flask, a special liquid plaster called investment is mixed and poured over the tree to fully encase it. Before the plaster hardens, the mold is placed in a vacuum chamber to remove any air bubbles that could cause issues later. Once the plaster mold has hardened and cured, it is put into a very hot oven overnight. This process burns out the wax, leaving a hollow tree-shaped cavity in the plaster to be filled with molten metal.

After the mold has hardened and the wax is removed, grains of silver alloy along with other metals are melted in a separate casting furnace. When the metal reaches the correct temperature, it is poured into the hardened plaster mold that contains the tree impression. Sometimes, the mold is spun to ensure that the molten silver quickly fills the topmost branches, capturing every detail before it begins to cool. Once the silver hardens, the mold is immersed in a bucket of cold water to dissolve the plaster.

Now, the silver tree can be accessed, allowing the extraction of jewelry models that are exact replicas of the original wax pattern. These models are cut free from the sprue and sent to jewelers, who will perform polishing, fabrication, and stone setting to turn the casting into fine jewelry.

With advancements in high-frequency melting and other technologies, jewelry casting equipment is now more dynamic than ever. This powerful induction heating generator enables fast and efficient melting and mixing of both precious and non-precious metals and alloys. A heavy-duty DC motor provides high-speed, high-acceleration centrifugal casting, resulting in excellent compaction of the metal and precise filling of the finest details.

We have collaborated with our metal suppliers to establish exact casting parameters for all of our silver works. You can be assured that we have a specific digital program stored in our database to achieve perfect casting quality and repeatability. However, the final piece is rechecked to ensure that no errors were introduced during the casting process. In particular, quality controllers examine the piece for signs of porosity—tiny grains, voids, or bubbles that indicate that the molten metal did not properly fill the mold, which compromises the integrity of the metal. Porosity can signify a weakness in the metal’s crystalline structure.

First, the jewelry is removed from the branch, or sprue, that held it in place during molding. It is then tumbled to smooth its surface, and may be sanded, lapped for crisp edges, and buffed by hand on a polishing wheel. Integrated infrared temperature control ensures consistent casting quality and repeatability throughout the process.

Now that all the jewellery pieces have been cast and pre-polished, the next step in the jewellery manufacturing process is assembly. During this phase, components such as earring posts are added to earrings, bails are attached to pendants, and links are joined for bracelets. To accomplish this, a special silver alloy is used for soldering or welding these silver components, known as findings, into place. This alloy melts at a slightly lower temperature than the cast jewellery pieces. Once all the soldering is completed, the jewellery is ready to proceed to the pre-polish stage.

Once the metalwork is completed, the next step in jewelry manufacturing is buffing and polishing. Jewelry polishing is a multi-stage process during which the metal is buffed using soft rotary tools made from bristles, felt, or muslin. This process is applied in descending stages, starting with coarse tools and moving to finer ones. Various polishing compounds are used to achieve the desired luster. Our experienced artisans in the polishing department utilize special techniques to bring out the ultimate shine in every piece of jewelry we create.

Buffing and polishing, although often used interchangeably, are two distinct operations that produce the final high luster on jewelry. Buffing is an abrasive process that removes a small amount of the surface material. The most commonly used compound for buffing is Tripoli. This compound helps to eliminate minor scratches left from sanding and smooth out all surfaces, but it does not create a bright polish. It’s essential to buff jewelry pieces before setting the gemstones; once the gemstones are set, the area beneath them cannot be polished, which may affect their shine.

The final high luster is achieved through polishing, which occurs at the last stage of jewelry manufacturing. Polishing employs more advanced compounds such as rouge, which come in various types distinguished by their color. Unlike buffing, polishing with rouge involves almost no cutting action; instead, it burnishes the metal by moving the surface layer around to smooth out the fine scratches left from buffing. This hand-polishing process carefully reveals and showcases the natural properties of oxidized silver.

Explore our vibrant collection of gemstone jewellery, which can add unique shapes and colors to your wardrobe. Our designers have crafted a showroom filled with an array of gemstone styles, showcasing colors that range from translucent to opaque in every hue of the rainbow. You can find everything from delicate red garnet to Swiss blue topaz and green peridot, all meticulously designed by talented artisans. In addition to traditional gems, we offer exotic pieces featuring rare, multi-faceted, one-of-a-kind gemstones in shapes and colors not commonly found in conventional jewellery stores.

Stone setting is a crucial stage in jewellery manufacturing, where gemstones are securely attached to metal castings. The art of incorporating gems into a jewellery piece goes beyond their intrinsic beauty; it involves balancing various factors. A well-designed stone setting must achieve several goals simultaneously: it should hold a gemstone securely, enhance its brilliance by showcasing its cut, clarity, and color, endure daily wear while protecting the stone, and artfully complement the overall design of the piece.

The ultimate aim is to display the gemstone in a way that flatters it without drawing attention to the method used to secure it. Jewellery designers employ various techniques for setting gemstones, typically based on the gem’s cut and proportions. Some of these methods, such as prong setting, bezel setting, channel setting, pave setting, and tension setting, are widely accepted and appreciated around the world.

A selection from our vibrant collection of gemstone jewelry can add an unusual shape and unique color to your wardrobe. Our designers have created a showroom filled with various gemstone styles featuring colors that range from translucent to opaque across the spectrum. From delicate red garnet to Swiss blue topaz and green peridot, our talented artisans have crafted an impressive variety of designer-colored stone jewelry. In addition to traditional gems, you will find exotic pieces containing rare, multi-faceted, one-of-a-kind gems in shapes and colors not typically seen at conventional jewelry stores.

Many of our creative collections require individually hand-cut gemstones in freeform inlay shapes. Cutting a gemstone is a slow process that involves grinding some of the world’s most complex substances into geometrically precise shapes, faceting, or other intricate designs. Each step in cutting and polishing takes dedication and skill to ensure that each stone perfectly fits its setting. The process begins by using a diamond saw to trim the rough piece into a more manageable size or shape, or to remove damaged parts of the stone.

The next step, known as grinding, involves the cutter using a machine embedded with diamonds to give the stone its approximate shape. A water supply in the machine acts as a coolant and lubricant, washing away debris and preventing the stone from overheating as it is ground on progressively finer wheels. After grinding, the cutter uses wheels with finer abrasives in the sanding stage, which removes deep scratches left by coarser abrasives during grinding. This stage allows for more delicate control over the final shaping of the stone before polishing.

Finally, the cutter uses a special polishing lap that is even finer than the faceting lap and is primed with high-quality diamond powder. Each facet of the stone is polished individually to achieve a high sheen, resulting in a fine luster. The stone is then polished with excellent abrasives to create the surface luster and complete the incredible transformation of the rough stone into a beautiful gem.

There is a science behind the art of cutting gems, involving factors like cut angles, table percentages, hardness, cleavage, inclusions, polishing wheels, sandpaper grits, and many other measurements. A skilled cutter performs each step with intuition and expertise, leading to a symmetrical, scintillating, and beautiful finished piece. Attaining a high level of competence in this art takes many years, as skilled cutters must visualize how a piece of rough can be transformed into a masterpiece while balancing various considerations and challenges along the way.

After insertion, stones are ground down using water-cooled grinding wheels, ensuring that they are flush with the surface of the casting. Finally, they are polished with a fabric-covered rubber disc coated with diamond compounds of varying grits. It is at this point that, as Bagley states, the incomparable result of inlay is realized: “the fluid flow of gem and silver creates a seamless blend of mineral and metal.”

The piece of jewelry is now finished and requires only a light final polish to enhance the high luster and shine of the silver. Polishing involves using more complex compounds, such as rouge, to achieve the desired finish. Different varieties of rouge are available for various uses, and they are distinguished by their color. For wholesale silver jewelry, fine red jeweler’s rouge is applied to a soft cotton cloth, which is then used to buff the piece by hand, ensuring that every detail and highlight shines. The use of rouge involves minimal cutting action; instead, it burnishes the metal, smoothing out fine scratches left from previous buffing.

Our experienced artisans in the polishing department use specialized techniques to bring out the ultimate luster in every piece of jewelry we create. During this process, the natural properties of oxidized silver are revealed and showcased as the pieces are meticulously polished by hand. With this final step in the jewelry manufacturing process, the pieces are now ready to be worn and appreciated for their beauty and craftsmanship.