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Brand New 925 Sterling Silver Chain 18" 23.4g N925-130
- Product Code: N925-130
- Availability: In Stock
£95.00
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Certified & Hallmarked
Established Jeweller
Brand New 925 Sterling Silver Chain 18" 23.4g N925-130
This brand new, hallmarked 925 sterling silver chain represents a fusion of contemporary link engineering and traditional precious metal standards. Sourced and verified by our workshop in Totnes, the N925-130 model provides a significant 23.4-gram mass, offering a heavy-duty alternative to mass-produced lightweight chains, ensuring long-term structural integrity and high commodity retention.
Total Mass
23.40g
Certified Weight
Purity Grade
925 Silver
Sterling Standard
Dimensions
18 Inches
Princess Length
Stock Ref
N925-130
Official SKU
Assay Office
UK Hallmarked
Legal Guarantee
Technical 7-Table Framework: Silver Chain Analysis
1. Metallurgical Profile & Alloy Verification
| Parameter | Specification | Technical Limit | Workshop Notes |
|---|---|---|---|
| Primary Alloy | 92.5% Fine Silver | Min 92.5% | Verified by Assay hallmark |
| Hardening Element | 7.5% Copper | Max 7.5% | Ensures tensile strength for heavy links |
| Specific Gravity | 10.49 g/cm³ | Standard | Confirms solid core; no hollow centers |
Table 1 Analysis: The metallurgical composition of this 23.4g chain adheres strictly to the Sterling standard. Unlike "silver-plated" alternatives, this item is a homogenous alloy. Our technical team has verified that the copper content is optimized to provide the necessary hardness (approx. 75-100 Vickers) to resist link deformation under the 23.4g load.
2. Link Geometry & Structural Load
| Metric | Measurement | Density Ratio | Stress Capacity |
|---|---|---|---|
| Width | 4.1 mm | High Density | High impact resistance |
| Depth | 2.6 mm | Reinforced Wall | Resistant to crushing/twisting |
| Linear Mass | 1.30g per inch | Superior | Engineered for heavy pendant support |
Table 2 Analysis: With a linear mass of 1.30g per inch, this chain belongs to a higher weight class than standard new silver chains. The 4.1mm width provides a broad surface area, distributing the pressure across the neck evenly and reducing friction-wear at the interlocking points.
3. Fastening & Clasp Mechanics
| Component | Type | Spring Material | Security Rating |
|---|---|---|---|
| Main Clasp | Premium Lobster/Trigger | High-Carbon Steel | Level 5 (Max Security) |
| Jump Ring | Heavy Gauge Round | Solid 925 Silver | Soldered Closure |
| Terminal Ends | Thick-Walled End Caps | N/A | Reinforced Tension Points |
Table 3 Analysis: The fastening system is the primary failure point in jewellery. This model utilizes a high-tension spring within the trigger mechanism. We have performed a cycle-stress test on this batch to ensure the spring does not fatigue. All jump rings are professionally soldered to prevent the chain from pulling apart under sudden tension.
4. Geometric Comparison: Chain vs Bracelet
| Factor | 18" Chain Analysis | 7.5" Bracelet Analysis |
|---|---|---|
| Impact Frequency | Low (Chest protected) | High (Wrist exposure) |
| Visibility Range | 180-Degree Frontal | Restricted to limb movement |
| Maintenance Cycle | Annual Polish Recommended | Quarterly Cleaning Recommended |
Table 4 Analysis: Choosing an 18" chain over new silver bracelets offers technical advantages in longevity. Neck-worn assets experience significantly less "surface abrasion" and "impact trauma" than wrist-worn items, preserving the hallmark and surface finish for longer periods.
5. Physical Comfort & Drape Analysis
| Length | Anatomical Placement | Movement Profile | Comfort Rating |
|---|---|---|---|
| 18 Inches | Base of Neck/Collarbone | Self-Centering | Optimal for 24/7 wear |
| Flexibility | Full 360 Axis | No Kinking | Fluid Link Motion |
Table 5 Analysis: The 18-inch "Princess" length is technically designed to center itself via gravity. At 23.4g, the mass is sufficient to prevent the chain from "riding up" or rotating, which is a common issue with lighter 2g-5g chains.
6. Regulatory & Hallmarking Standards
| Legal Requirement | N925-130 Status | Authority |
|---|---|---|
| Hallmark > 7.78g | Fully Compliant | UK Assay Office |
| Purity Stamp | "925" Present | Independent Audit |
| Makers Mark | Verified | Traceable Production |
Table 6 Analysis: Under the UK Hallmarking Act 1973, any silver item over 7.78g must be hallmarked. This 23.4g chain has been independently tested for fineness. This is a critical distinction from imported silver that may only bear a "925" stamp, which is not a legal guarantee of purity in the UK.
7. Maintenance & Environmental Resistance
| Agent | Effect | Mitigation |
|---|---|---|
| Oxidation | Silver Sulfide (Tarnish) | Microfiber Polishing |
| Chlorine | Surface Pitting | Removal in Pools |
| Skin Acidity | Minor Discolouration | Regular Freshwater Rinse |
Table 7 Analysis: As a brand new item, the surface is free of microscopic scratches that trap pollutants. To maintain the 23.4g of silver in peak condition, we recommend avoiding chemical cleaning "dips" which can be abrasive. Simple mechanical polishing with a dual-layer cloth is sufficient to maintain the specular reflection.
20 Technical FAQs: Engineering & Asset Management
Metallurgy & Purity Standards
1. What exactly constitutes the "925" in this 23.4g chain?
The "925" denotes that 92.5% of the total mass (21.64g) is pure fine silver. The remaining 7.5% is typically copper. This ratio is the international technical standard for jewellery because pure silver (99.9%) is too soft to maintain the mechanical shape of a 4.1mm link under daily tension.
2. Is this chain "Silver Filled" or solid throughout?
This is a solid sterling silver item. "Silver filled" or "bonded" jewellery contains a base metal core (like brass) which accounts for the majority of the weight. This chain's 23.4g mass consists entirely of the 925 alloy, ensuring it can be polished or repaired without revealing a different metal underneath.
3. Why is the UK Hallmark important for this specific weight?
Because this chain weighs 23.4g—well above the 7.78g legal threshold—it must be hallmarked by a UK Assay Office. This process involves scraping a tiny amount of metal for laboratory testing. It is your only legal guarantee that the item is truly sterling silver and not a high-quality counterfeit.
4. Will the weight of the chain change over time?
Microscopic amounts of metal are lost during the polishing process over decades. However, due to the substantial 23.4g starting weight and the 2.6mm depth of the links, any mass loss from standard wear and tear would be negligible and would not impact the structural safety of the chain for several lifetimes.
Structural Engineering & Durability
5. What is the maximum pendant weight this chain can support?
Technically, a solid 23.4g sterling silver chain with soldered jump rings is engineered to support pendants up to approximately 40g-50g. Using a heavier pendant than the chain itself is possible, but for optimal drape and to prevent "neck fatigue," we recommend a new gold pendant or silver pendant between 5g and 25g.
6. How does the 4.1mm width impact daily durability?
Width correlates to the thickness of the individual links. A 4.1mm width allows for a 2.6mm depth, creating a robust "wall" on each link. This thickness prevents the links from "stretching" or becoming oval-shaped over time, a common failure in thinner 1mm-2mm chains.
7. Are the jump rings on SKU N925-130 soldered?
Yes. In our technical audit, we ensure that the terminal jump rings—which connect the chain to the clasp—are fully soldered. Un-soldered rings are a security risk as they can pull open under tension. Soldering creates a continuous loop of silver that requires significant force to break.
8. What is the "Tensile Strength" of 925 Sterling Silver?
Sterling silver has a tensile strength of approximately 300 MPa (Megapascals) when properly alloyed and work-hardened. This means the 23.4g of silver in this chain is highly resistant to breaking under the normal physical forces encountered during movement or accidental snagging.
Environmental Factors & Care
9. Why does silver tarnish, and how does it affect this chain?
Tarnish is a chemical reaction between silver and sulfur in the air (forming Silver Sulfide). It is a surface-level reaction and does not mean the metal is "corroding" internally. Because this is a brand new item, the polished surface is smooth, making it harder for sulfur to bond compared to old, scratched silver.
10. Is it safe to wear this 23.4g chain in the shower?
While water itself doesn't damage silver, chemicals in shampoos and soaps can leave a film. Over time, this residue can build up inside the link pivots, acting as a microscopic abrasive. We recommend removing the chain for hygiene and to maintain the mirror-finish lustre.
11. How should I clean the N925-130 at home?
Use a professional silver polishing cloth. Avoid "liquid dips" for this chain; because the links are tightly interlocking, liquid chemicals can get trapped in the pivots and continue to react with the metal if not rinsed perfectly. A dry cloth is safer and highly effective for 925 alloys.
12. Can swimming in a pool damage the silver?
Yes. Chlorine is highly reactive and can cause "Stress Corrosion Cracking" in silver alloys. It can also cause the silver to turn black almost instantly. Always remove your 23.4g chain before entering a chlorinated pool or hot tub to protect the integrity of the alloy.
Asset Value & Authenticity
13. Does this chain hold its value as a financial asset?
Yes. High-gram silver items like this 23.4g piece have a "melt value" based on the current market spot price of silver. Unlike costume jewellery, which has zero resale value, this chain is a tangible commodity. Its value is tied to its mass and purity, providing a degree of financial equity.
14. What is the benefit of buying "Brand New" vs "Second Hand"?
Buying brand new ensures the chain has 100% of its original factory tension and no "link-thinning" from decades of wear. While a second-hand silver chain is excellent for vintage appeal, a new item like the N925-130 offers maximum mechanical lifespan.
15. How do I verify the H.E. Phillips Ltd guarantee?
H.E. Phillips Ltd has been a physical presence in Totnes since August 2000. Every item we sell is backed by our reputation as a brick-and-mortar specialist. You are welcome to bring the item to our 19 Fore Street showroom for a complimentary weight and purity verification on our lab scales.
16. Is silver a sustainable choice for jewellery?
Silver is one of the most recycled metals on earth. By purchasing high-quality, solid 925 silver rather than disposable "fast-fashion" jewellery, you are acquiring an item that can be melted down and repurposed indefinitely, minimizing environmental impact over time.
Style & Coordination
17. Can I pair this silver chain with a gold ring?
Mixing metals is a common modern aesthetic. However, for a technically cohesive look, we recommend pairing this chain with a new gold ring that has white gold or platinum accents, as the cool tones of the 925 silver will complement those specific metals.
18. Is the 18" length suitable for men and women?
Yes, the 18" length is considered unisex. On most women, it sits at the "Princess" length (just below the collarbone). On most men, it sits closer to the base of the neck. We recommend measuring your neck circumference to ensure the 18" span aligns with your preferred style.
19. How does the 23.4g weight feel on the neck?
It provides a "substantial" feel. You will be aware of the chain's presence, which many users find reassuring. This mass prevents the chain from tangling in hair or clothing, as the weight keeps the links under constant, gentle vertical tension.
20. Can I trade this in later to H.E. Phillips Ltd?
Yes. We offer a transparent sell gold or sell silver service. Because this chain is fully hallmarked and weighs 23.4g, it is easy to value based on its weight and condition should you ever wish to upgrade your collection.
© 2026 H.E. Phillips Ltd - Your Official Authorised Fine Jewellery Specialist. All Technical Data and Hallmarks verified for accuracy.
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