品質証明書

Quality Certificates | Sobling® Sustainable & Certified Silver Jewelry Manufacturer

🌍 Our Commitment to Quality – Backed by Global Certifications


✅ Why Choose Sobling? It's Not Just Beautiful Jewelry, It's Trust You Can Feel.

At Sobling, we believe jewelry is more than just an accessory – it’s a promise of quality. That’s why we follow the highest standards in sourcing, production, and testing to ensure safety, sustainability, and compliance at every step.


♻️ Certified Sustainable Materials

  • RJC Recycled Silver: All silver we use is sourced from Responsible Jewelry Council certified recycled silver.
  • SGS & CTT Compliance: Materials fully comply with California Proposition 65 そして EU REACH (211 SVHCs) standards, ensuring safety and eco-friendliness.

🧪 Material Safety Backed by Trusted Testing

  • SGS認証 – World-leading inspection and certification
  • CTT Reports – Verified compliance with heavy metal and allergen safety standards
  • Every item can be provided with compliance documents upon request.

📄 Certification Types We Offer

カテゴリー 説明
Material Testing Report Includes silver content, nickel release, and safety tests
Sustainability Proof Verifies use of recycled and eco-compliant materials
Compliance Documents For Prop 65, REACH, and other international regulations

Just mention what documents you need when placing an order, and we’ll prepare everything for your shipment and brand support.


💬 Frequently Asked Questions

  • Is your silver real and safe? Yes. We use 100% genuine 925 sterling silver and offer full testing certifications.
  • Are your materials eco-friendly? Absolutely. Our silver is recycled and certified by RJC, SGS, and CTT. Free from harmful substances.
  • Can you provide certificates with orders? Yes, simply let us know which reports you need — we’ll include them with your shipment.

🛡️ Quality Is the Best Marketing Strategy

Working with Sobling means more than just getting beautiful silver jewelry. You get a reliable, sustainable, and globally certified manufacturer that builds real brand trust and long-term value for your business.

Sobling Jewelry Quality Certificates
TUV認証 EUリーチ基準適合品質
TUV認証 EUリーチ基準準拠品質
TUV認証塩水噴霧腐食コンプライアンス品質
TUV認定塩水噴霧腐食適合品質
20250525 sgs astm report
SGS Certified USA ASTM F2999-19 Compliant Quality Report
宝飾品めっき試験報告書 - FISCHER認定誠実なめっき準拠品質
FISCHER認定オネストメッキ準拠品質
SGS認証-999-銀粒コンテント・テスト
SGS認定999銀粒度試験
SGS認証カリフォルニア州提案65号試験報告書
SGS認定カリフォルニア州プロポジション65試験報告書
レスポンシブル・ジュエリー協議会-リサイクル・シルバー・ソース
レスポンシブル・ジュエリー協議会 リサイクル・シルバー・ソース
ECHA-211-物質試験報告書
欧州化学物質庁 211物質試験報告書
ニッケル・リリース試験報告書
シルバー・モイッサナイト・ピアス ニッケル溶出試験報告書
3ミクロン金めっき試験報告書
3.0ミクロンのヴェルメイユ・レベルの18K金メッキの厚さ
GTC認定純正モアッサナイト検査報告書_1
GTC認定純正モアッサナイト検査報告書
シルバー925 キュービックジルコン・ピアス証明書_1
シルバー925 キュービックジルコン・フックピアス証明書
What Do Certificates Really Mean to Your Business?

Certified to Protect Your Brand

Each certification we hold is more than just a document — it’s a promise of safety, quality, and global compliance. Here’s how each one benefits your brand and customers.

1. EU REACH Compliance (TUV Certified)

  • Feature: Our products are tested and certified under the European Union’s REACH regulation, which screens for harmful substances such as lead, cadmium, chromium VI, and nickel release. The testing is conducted by TUV, a globally recognized lab.
  • Advantage: This ensures full compliance with EU environmental and consumer protection laws. It also verifies that our silver jewelry is safe to wear for individuals with metal sensitivities or skin allergies.
  • Benefit: You can confidently sell in any EU country, promote your jewelry as safe and hypoallergenic, and reduce the risk of customs rejection or customer complaints due to unsafe materials.
📄 Europe Union Reach Test Standard Values for Jewelry

Regulations limit the usage of the following metals in any component of the jewelry or watch items. It is an offence not to comply with these conditions.

カテゴリー 説明
NICKEL release is limited to 0.5 micrograms per cm2, per week.
LEAD content is limited to less than 0.05% by weight in any individual part of the jewelry article.

CADMIUM

content is limited to less than 0.01% by weight in any individual part of the jewelry article.
CHROMIUM VI not to be included in any quantity.

NOTE: for earrings, nickel release is limited to 0.2 micrograms per cm2, per week.

2. Salt Spray Corrosion Test (TUV Certified)

  • Feature: Our jewelry undergoes accelerated corrosion testing in a controlled salt spray environment to simulate months of exposure to moisture, sweat, and oxidation.
  • Advantage: This test evaluates the durability of electroplating and surface finishes. It confirms that our plating won’t easily tarnish, peel, or discolor under normal usage.
  • Benefit: Your customers will enjoy jewelry that maintains its original shine and beauty over time, which means fewer returns, fewer complaints, and more 5-star reviews.

3. ASTM F2999-19 U.S. Safety Certification (SGS Certified)

  • Feature: This certification tests for potential skin allergens and heavy metals as per the U.S. ASTM F2999-19 standard, specifically developed for adult fashion jewelry.
  • Advantage: It confirms that your jewelry is legally safe for distribution across the United States, including through major online platforms such as Amazon, Walmart, and Shopify.
  • Benefit: You can confidently enter the U.S. market, streamline customs clearance, and demonstrate credibility to American buyers and platforms with strict compliance requirements.

4. FISCHER X-Ray Plating Thickness Verification

  • Feature: Using X-ray fluorescence (XRF) technology, we measure and verify the exact thickness of plating materials such as gold, silver, or rhodium on each piece.
  • Advantage: This test eliminates any guesswork about coating durability. It guarantees the finish is consistent, high quality, and meets standards for vermeil or heavy gold plating.
  • Benefit: You can position your jewelry as luxury-grade, justify a premium price, and assure customers of lasting shine that doesn’t fade after just a few wears.

Long-Lasting Gold Plating Colors

最先端のメッキプロセスと最も厳しいメッキ厚さの基準を採用することで、ジュエリー製品の金色が長持ちし、色落ちしないことを保証し、顧客の満足度とブランドの評判を高めます。

金の種類 めっき層の厚さ 色保持時間
ゴールドフィルド ゴールドフィルド1 x > 3 micron 3~5年
ゴールド・ヴェルメイユ ゴールド・バーメイル 1 0.5 < x ≤ 3 micron 1~2年
金メッキ 金メッキ 1 0.03 < x ≤ 0.5 micron 6～12カ月
5-Layers Plating Protection For Gold Color

最も厳しいメッキ厚基準は6層メッキ。

Long Durable White Rhodium Plating

To keep your jewelry collections shining for years, the plating process matters. By using advanced rhodium plating technology and maintaining precise layer thickness, each piece achieves exceptional durability, resistance to tarnish, and a lasting bright white finish — ensuring your customers stay satisfied and your brand stays trusted.

金の種類 めっき層の厚さ 色保持時間
White Rhodium Ultra white rhodium filled x > 0.15micron 3~5年
White Rhodium Pro white rhodium thick plating 0.05 < x ≤ 0.15micron 1~3 Years
White Rhodium Plus white rhodium flash plating 0.01 < x ≤ 0.05 micron 3~12 Months
20251024 ソブリングホワイトロジウムメッキ5層2

Every option offers reliable protection and a refined appearance — choose the grade that matches your product positioning and customer expectations.


5. SGS Certified 999 Fine Silver Purity Test

  • Feature: Our raw silver is tested before production to confirm a purity level of 99.9%, meeting the standard for fine silver jewelry.
  • Advantage: High-purity silver resists tarnishing, is softer for detailed craftsmanship, and provides an authentic “fine jewelry” feel to each design.
  • Benefit: You can promote your jewelry as genuine 999 silver, add trust for luxury buyers, and meet the expectations of high-end customers.

6. California Proposition 65 Compliance (SGS Certified)

  • Feature: This test checks for over 800 hazardous substances including lead, mercury, cadmium, and phthalates, which are banned under California’s Proposition 65 law.
  • Advantage: It allows legal sales in California — one of the strictest U.S. states for consumer product regulations — and prevents product bans or penalties.
  • Benefit: You can sell freely in all 50 U.S. states and on platforms like Amazon without fear of being flagged, reported, or removed due to toxic material concerns.

7. Responsible Jewelry Council (RJC) Recycled Silver Certification

  • Feature: Our silver is sourced from RJC-audited suppliers who provide traceable, recycled materials in line with ethical sourcing practices.
  • Advantage: It supports your sustainability goals and aligns your brand with environmental and social responsibility values increasingly demanded by modern consumers.
  • Benefit: You can market your jewelry as eco-friendly, appeal to conscious shoppers, and gain an edge when applying for sustainable marketplace badges or B Corp certifications.

8. ECHA SVHC 211 Substance Test Report

  • Feature: This certification confirms that the product does not contain any of the 211 Substances of Very High Concern (SVHCs) restricted under EU REACH by the European Chemicals Agency.
  • Advantage: It ensures full chemical compliance, reduces liability, and demonstrates commitment to safe, non-toxic jewelry production.
  • Benefit: You protect your brand reputation, meet European distributor requirements, and win trust from quality-conscious customers who care about material safety.

9. Nickel Release Test (CTT Certified)

  • Feature: The jewelry is tested using skin-simulation methods to measure the rate of nickel ion release. We meet EU nickel release limits (EN 1811 standard).
  • Advantage: This guarantees the jewelry is suitable for individuals with nickel allergies — a common cause of skin irritation from fashion jewelry.
  • Benefit: You can confidently label your products as “nickel-free” or “hypoallergenic,” expanding your target market and reducing return rates due to allergic reactions.

10. 3.0μm Vermeil Gold Plating Thickness Verification

  • Feature: Independent lab measurement confirms our gold layer is at least 3.0 microns thick — qualifying as vermeil according to U.S. Federal Trade Commission (FTC) guidelines.
  • Advantage: Thicker plating means better durability, longer color retention, and added value for premium jewelry lines.
  • Benefit: You gain a legitimate basis to position your products as fine vermeil jewelry, elevate your brand image, and attract customers seeking luxury without the full gold price.

11. GTC Certified Moissanite Gemstone Authenticity

  • Feature: Each moissanite stone is tested for refractive index, thermal conductivity, and visual clarity using gemological standards.
  • Advantage: This ensures that your stones are not only authentic but also exhibit the brilliance and sparkle expected from high-quality moissanite.
  • Benefit: You offer your customers full confidence in the gemstones they’re buying — reducing doubts, returns, and increasing satisfaction.

12. 925 Silver & CZ Hook Earring Quality Certificate

  • Feature: These earrings are tested and certified by national-level authorities for 925 sterling silver content, plating quality, and cubic zirconia setting security.
  • Advantage: It assures you that the product is structurally sound, made from certified materials, and export-compliant for regulated markets.
  • Benefit: You can promote your designs with full transparency, meet import regulations, and give B2B buyers and end-customers peace of mind.

Do you have any questions about Jewelry certificates?

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規制と基準

宝飾品品質規則および基準マニュアル

ソブリングは世界的な宝飾品品質試験規格および規制を理解し、貴社の製品がコンプライアンス要件を満たすことを保証するオールインワンソリューションを提供します。欧州のREACH規格から米国のASTM F2999およびカリフォルニア州プロップ65まで、包括的なガイダンスと認証サポートを提供します。詳細な文書と表に各市場の規制の概要が記載されているため、安心して手間のかからない業務を行うことができます。
ジュエリー・レギュレーション・スタンダード・マニュアル_1
Jewelry Products Testing Regulations & Standard Manual - Sobling.jewelry
ジュエリー規制-スタンダード-年間規制要件-詳細_1
Jewelry Regulations & Standard Manual - Regulatory Requirements Details
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ソブリングは品質基準を尊重する

ソブリングは、TUV CNAS CTCなどの品質証明書に準拠しています。