Manufacturing Excellence
& Quality Compliance
How we make 925 sterling silver jewelry in Surabaya — from raw silver to finished, certified piece
International buyers choose Artistica not only for our designs, but because they trust our production process. This page explains exactly how we manufacture, what quality controls we apply, and what compliance standards we meet — so you can source with confidence.
What 925 Sterling Silver Means
925 sterling silver is an alloy of 92.5% pure silver and 7.5% copper. The copper component adds the structural strength needed for jewelry without compromising the bright, white character of pure silver. Every piece we produce meets or exceeds this purity standard — no lower-grade alloys, no silver-plated base metals.
We source our silver grain from established Indonesian metal suppliers with documented purity grades. Our in-house goldsmith team tests alloy purity before each production batch. Finished pieces are available with individual 925 hallmarks stamped or lasered as required by your destination market.
All production batches are nickel-free, meeting the EU Nickel Directive (94/27/EC). Safe for sensitive skin. No nickel used in alloy or plating processes. Written nickel-free declaration available on request.
Zero lead content in all silver alloys and soldering materials. Compliant with REACH regulation and California Proposition 65 requirements for jewelry sold in the USA.
No cadmium in any solder, alloy, or surface treatment. This eliminates a significant health and import compliance risk for buyers selling in Europe, USA, and Australia.
Standard 925 stamps applied inside rings and on clasps. Laser engraved purity marks available for thin pieces where physical stamping is not possible without damage.
All goods are manufactured in Indonesia and documented accordingly. Certificates of Origin (Form E, IJEPA, IA-CEPA) available for preferential duty rates in key markets.
Our silver is sourced from established Indonesian suppliers operating within regulated frameworks. We do not use silver from conflict-affected regions and can provide supplier documentation on request.
Government-issued Halal certificate from BPJPH (Badan Penyelenggara Jaminan Produk Halal), Indonesia's official state Halal authority. Artistica Jewelry was the first jewelry manufacturer in Indonesia to receive government-issued Halal certification, and remains the only one to date. Covers all 12 product categories including rings, necklaces, earrings, bracelets, pendants, and brooches. Certificate copy available on request.
Every casting is inspected immediately after removal from the investment. We check for porosity, incomplete fill, distortion, and alloy inconsistency. Pieces that fail are returned to the melt — no rework of structural defects.
- Surface porosity check
- Dimensional accuracy vs. CAD model
- Alloy visual consistency
- Structural integrity (no cracks)
After polishing and surface treatment, each piece is re-inspected under magnification. Surface finish, stone settings (if applicable), and assembly joins are verified. Any piece with scratches, pitting, or loose settings is sent back for correction.
- Surface finish uniformity
- Stone setting security
- Plating consistency (if applicable)
- Assembly and join quality
Piece-by-piece final check before packing. Weight verified against spec, hallmark confirmed, clasps and closures tested for function. Photos of a sample batch shared with buyer before shipment confirmation.
- Weight within ±5% of spec
- 925 hallmark present and legible
- Clasp and closure function test
- Pre-shipment photo documentation
Pure silver grain melted with copper to create 925 alloy. Purity tested before use.
Designs carved or 3D-printed in wax. Assembled into a casting tree.
Molten silver poured into plaster investment mold. Wax burns out, silver fills exact form.
Pieces cut from the casting tree. Sprues filed, excess silver removed, edges cleaned.
Hand sanding, barrel tumbling, and polishing to achieve specified surface finish.
Gemstones set by hand under magnification. Checked for security before proceeding.
Rhodium, gold, or rose gold plating applied by electrolytic process. Thickness specified per order.
Three-stage inspection, tagging, and packing in branded or neutral packaging for export.
Sustainable Manufacturing Practices
All casting sprues, filings, and polishing dust are collected and recycled back into the silver supply. Near-zero silver waste production.
We employ and train local Surabaya craftspeople in traditional silversmithing, preserving Indonesian metalworking heritage.
Plating chemicals handled under proper containment and disposal. We do not discharge untreated chemicals into local water systems.
All staff paid above Indonesian minimum wage with proper contracts. No child labor, no forced overtime — artisan welfare is core to our craft.
Request a Factory Overview Document
We can provide a detailed factory profile including production capacity, team size, and compliance documentation for your due diligence process.