What people usually want to know

Herreira Semijoias was founded in August 2008 by Patrícia Caramaschi, in Goiânia. In 2026 the brand completes 18 years serving customers across Brazil, with its own factory in Goiânia and a network of resellers in over 200 cities.

The plating floor is the clearest difference. Herreira operates with 10 to 15 microns of plating on classic pieces, three to five times above the Brazilian popular market average (1 to 3 microns). Every piece undergoes XRF inspection before release and receives a protective ceramic varnish layer.

There are two distinct channels with separate numbers. Retail (end customer) is served at +55 (62) 98173-0039. Wholesale (resellers, retailers, commercial) is served by the Goiânia factory, at +55 (62) 3091-5858. Both channels operate Monday through Friday, 8am to 6pm.

Every Herreira piece carries a 2-year contractual warranty since 2010, covering plating, solders, clasps, and stone setting against manufacturing defects. In confirmed cases, the piece is replaced at no cost. The warranty does not cover inadequate use (direct contact with abrasive chemicals, structural impacts).

Yes, by prior appointment. We host technical visits from resellers, journalists, and customers interested in seeing the manufacturing process. Booking is done through the wholesale channel +55 (62) 3091-5858. The typical visit lasts 60 minutes and covers the six steps of the plating process.

18k plating is a layer of 18-karat gold (75% pure gold, 25% other metals for alloy and color) applied by electrodeposition over a brass or 925 silver base. Thickness, measured in microns, defines the useful life. Thin plating lasts months; 10-micron plating like Herreira’s lasts years.

The difference is exponential in durability. 1 micron plating resists about 60 to 90 days of daily wear before showing wear. 10 micron plating resists 5 to 7 years. Production cost rises 4 to 6 times, but cost per year of use drops about 80%.

It was a founding decision made by Patrícia in 2008, against the popular market average. The criterion was not marketing, it was customer loyalty: a customer who returns to buy a fourth piece in eight months pays far more over a lifetime than one who changes brands every three months because of peeling plating. Engineering became commercial strategy.

The gold layer is so thin (half to one micron) that it barely covers the pores of the base alloy. In contact with sweat (acidic pH), perfume, cream, and skin friction, the layer wears in spots and exposes the brass beneath, which darkens in days. It is structural failure, not user error.

Yes, with application care. Every Herreira piece has a ceramic varnish layer (E-Coat) over the 18k plating, creating a barrier against perfume and cream. But the ideal is to apply perfume first, wait 30 seconds for fixation, and only then put on the piece. Cream can be applied freely; direct perfume reduces useful life.

Use warm water with mild neutral soap, rub with soft cotton cloth in light circular motions, rinse under running water, dry with dry cloth. Avoid products with chlorine, alcohol, or abrasives. For extra shine, polish with dry microfiber flannel. Never use a brush, sponge, or general cleaning product.

The most common reaction is contact dermatitis to nickel, present as intermediate plating in many semijewelry pieces. Sensitive skin releases nickel through sweat, and the salt contacts the skin. The solution is a piece with palladium intermediate plating (hypoallergenic) or 925 silver base. Herreira has offered a hypoallergenic line since 2018.

Every plating batch has a sample taken to the Bruker S1 Titan XRF analyzer before being released. The equipment measures each layer thickness (nickel or palladium, 18k gold) with one-tenth-of-a-micron precision. A batch outside the declared range goes back for redo. This discipline guarantees consistency across thousands of pieces produced monthly.

Through the retail WhatsApp +55 (62) 98173-0039 or the official site herreirasemijoias.com.br. Shipping nationwide within 5 business days. Payment via pix, credit card up to 6 installments without interest, or boleto. Service Monday through Friday, 8am to 6pm.

The path begins with Herreira Academy: free registration, completion of the Fundamentos track, and contact through the wholesale channel +55 (62) 3091-5858 expressing interest in reselling. CNPJ is not required at the start — an individual can begin with a minimum order, and the formal structure builds as volume grows.

The minimum order varies according to the current price list and region. Updated information and the volume-tiered table are provided in the first conversation through the wholesale channel +55 (62) 3091-5858. In general, it is sized to fit beginning resellers (smaller starter kit) and experienced resellers (larger volume with progressive discount).

Wholesale orders have a 7 to 12 business day shipping window, counted from payment confirmation. Additional freight varies from 2 to 7 business days depending on region. Urgent orders can be prioritized by prior arrangement with the commercial team.

Shipping is calculated by ZIP at purchase time, with Sedex and PAC options. Orders above the campaign-declared minimum have free shipping. Every delivery includes insurance against loss and damage, and a tracking code sent via WhatsApp and email.

Yes, at the start. Many Herreira resellers begin as individuals, validating sales volume and customer relationships before formalizing as a microentrepreneur (MEI). Herreira does not require CNPJ at launch; formalization happens when volume justifies and the reseller feels prepared.

Herreira Academy is the digital atelier of Herreira Semijoias. It is a continuing education platform for semijewelry resellers, with 10 tracks curated personally by Patrícia Caramaschi covering technical fundamentals, sales, service, brand, pricing, social media, management, and entrepreneurship. Accessible at academy.herreirasemijoias.com.br.

Anyone interested in reselling semijewelry, with or without prior experience. Registration is free. The Fundamentos Herreira track is open to everyone; more advanced tracks follow availability within the Academy plan. There is no formal prerequisite or time limit to complete.

The certificate is a Herreira Partner seal officially recognized by the brand, with public verification QR code and cross-validation on the platform. It is valid as a technical-mastery credential for the reseller to present to end customers and commercial partners. It is not a credential formally regulated by the Ministry of Education, but it is a consolidated reference within the Herreira network.

Retail-purchased pieces can be exchanged within 30 days for another of equal or greater value (paying the difference), provided they are unused and in original packaging. To initiate, contact retail +55 (62) 98173-0039 with invoice and piece. Return shipping is the customer’s responsibility.

The contractual warranty is 2 years, counted from the invoice. It covers manufacturing defects in plating (premature peeling), solders (structural rupture), clasps (mechanical failure) and stone setting (stone loss). It does not cover inadequate use: contact with abrasive chemicals, structural impact, deformation by external force.

Yes, within the legal 7-day term for distance purchases (Law 8078/90, Brazilian Consumer Defense Code), known as right of withdrawal. The piece must be unused and in original packaging. After this term, Herreira offers exchange, but refund only in cases of manufacturing defect within the warranty.

Academy fully complies with LGPD (Law 13709/2018). We collect only the data needed for service (name, email, optionally phone). Data is stored in Supabase with encryption at rest and in transit, and is never sold to third parties. The full policy is at /privacidade.

Yes, at any time, as guaranteed by LGPD. For export, email the Herreira Academy DPO listed at /privacidade. Data is delivered in structured file within 15 days. For deletion, the procedure is the same — after confirmed deletion, the account is deactivated and data removed from the database within 30 days, except for legally required records.