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Brand New 925 Sterling Silver Chain 18" 13.5g N925-137
- Product Code: N925-137
- Availability: In Stock
£50.00
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Established Jeweller
Brand New 925 Sterling Silver Chain 18" 13.5g N925-137
The acquisition of a brand-new sterling silver asset requires a meticulous verification of metallurgical purity and structural finishing. This 13.5-gram link chain, fully hallmarked and assayed, represents a high-standard specimen of 925 silver, engineered for daily wear while maintaining a sophisticated aesthetic profile suited for both standalone use and pendant support.
Net Mass
13.5g
Verified Scale
Alloy Grade
925 Silver
Sterling Standard
Linear Span
18 Inches
Princess Length
Reference
N925-137
Asset Serial ID
Workshop
Totnes
Devon, UK
Technical 7-Table Framework for Silver Assets
1. Metallurgical Composition & Alloy Stability
| Material | Silver % | Verification Method | Oxidation Profile | Structure |
|---|---|---|---|---|
| Sterling Silver | 92.5% | UK Hallmark / Assay | Standard Tarnish Cycle | Solid Alloy Core |
| Copper Alloy | 7.5% | Internal Hardener | Predictable Patina | Structural Matrix |
Table 1 Analysis: This asset is composed of genuine 925 Sterling Silver, which is the international standard for high-quality silver jewellery. The 7.5% copper content is vital for structural integrity, providing the Vickers hardness necessary to prevent the link-on-link abrasion common in pure "Fine Silver." Unlike plated alternatives, this solid alloy ensures that the piece will never peel or reveal a base metal core over time.
2. Link Geometry & Structural Integrity
| Profile | Width/Depth | Linear Density | Mechanical Performance |
|---|---|---|---|
| Sterling Link | 1.9mm x 1.9mm | 0.75g per inch | Balanced Flexibility |
| Clasp Interface | Reinforced | High-Stress Tolerance | Secure Pivot Point |
Table 2 Analysis: With a uniform width and depth of 1.9mm, the link geometry is designed for optimal "drape" across the collarbone. The 13.5g mass provides a linear density that is significantly higher than standard "budget" chains, ensuring that the links will not easily elongate or snap when supporting a new gold pendant or silver charm.
3. Hallmark & Provenance Benchmarks
| Requirement | Status | Location | Consumer Protection |
|---|---|---|---|
| Assay Hallmark | Fully Struck | End Link/Clasp | Legal Authenticity |
| 925 Stamp | Verified | Internal Hallmark | Purity Guarantee |
Table 3 Analysis: In accordance with UK law, any silver item weighing over 7.78g must be hallmarked. This 13.5g chain has undergone independent assaying to verify its 92.5% silver content. This provides the buyer with forensic certainty of the metal's purity, distinguishing it from unverified imports that may not meet British standards.
4. Regional Maritime Care Matrix
| Environmental Factor | Impact | Mitigation Protocol |
|---|---|---|
| Saline Air (Devon) | Accelerated Oxidation | Micro-fiber Cloth Buffing |
| Sulphide Exposure | Surface Dullness | Periodic Ultrasonic Cleaning |
Table 4 Analysis: Totnes and the surrounding Devon coastline present unique maritime challenges for silver assets. Saline air can accelerate the formation of silver sulphide. We recommend a regular "Fresh Water Rinse" followed by thorough drying to maintain the mirror-finish lustre and prevent the pitting associated with long-term salt exposure.
5. Ergonomic & Comfort Analysis
| Span | Target Position | Weight Distribution | Fit Rating |
|---|---|---|---|
| 18 Inches | Princess Length | Centred Gravity | Universal Comfort |
| Pivot Action | 360° Rotation | Non-Snag Geometry | Excellent |
Table 5 Analysis: The 18-inch length is technically categorized as a "Princess" fit, sitting gracefully just below the collarbone. This length is strategically chosen to ensure the clasp remains at the nape of the neck, preventing the "forward-creep" often experienced with lighter, unbalanced new silver chains.
6. Tension & Load Bearing Capacity
| Component | Tensile Limit | Link Connection | Security Level |
|---|---|---|---|
| Silver Alloy | High | Soldered Jump Rings | Maximum |
| Spring Clasp | High-Carbon Steel Spring | Repeat Action Tested | Verified |
Table 6 Analysis: The mechanical security of the clasp is audited for "Spring Fatigue." The internal mechanism utilizes a high-tension spring to ensure the gate closes flush every time. All terminal jump rings are soldered closed, removing the risk of "ring-opening" which is the primary cause of jewellery loss in non-specialist products.
7. Authority Comparison: H.E. Phillips vs Market
| Criterion | H.E. Phillips Ltd | General Online Sellers |
|---|---|---|
| Mass Accuracy | Calibrated to 0.01g | Estimated/Rounded |
| Hallmark Verification | Physical Inspection | Often Unverified Imports |
| Heritage | 25+ Years Experience | Variable/New Entrants |
Table 7 Analysis: Established in August 2000, H.E. Phillips Ltd provides technical accountability that digital-only retailers cannot match. Every gram is verified on laboratory-grade scales, and every hallmark is inspected under 10x magnification to ensure the consumer receives a legitimate, high-purity asset suitable for long-term retention.
20 Technical FAQs: Engineering & Asset Management
Metallurgical & Weight Properties
1. What is the significance of the 13.5g weight for this chain?
Weight is a primary indicator of durability. A 13.5g mass for an 18-inch chain equates to approximately 0.75g per linear inch. This density provides sufficient "wall thickness" in each link to resist crushing and stretching, ensuring the chain maintains its original length even after years of daily mechanical stress.
2. Is 925 Sterling Silver considered a "Pure" metal?
Technically, it is a binary alloy. It contains 92.5% pure silver and 7.5% hardening agents (usually copper). Pure silver (99.9%) is too soft for functional jewellery; the sterling alloy is an engineering necessity to provide the hardness required for the clasp and link friction points.
3. How do you verify the authenticity of the N925-137?
We perform a multi-stage audit: first, a visual hallmark check under a workshop loupe; second, a mass verification on calibrated digital scales; and third, a physical inspection of the "Struck Marks" to ensure they align with official UK Assay Office standards.
4. Does the weight affect the silver's intrinsic value?
Yes. Because silver is a precious commodity, the weight directly correlates to its "melt value" or scrap floor. A 13.5g chain has nearly triple the silver content of standard 5g chains, providing a more substantial hedge against inflation and better value retention over time.
Structural Design & Security
5. Why are the link dimensions 1.9mm x 1.9mm?
This "Square Profile" geometry is engineered for maximum light refraction. By having equal width and depth, the link presents more surface area to ambient light, creating a consistent shimmer regardless of how the chain twists during movement on the wearer's neck.
6. Can I securely attach a pendant to this specific chain?
Yes. The 13.5g weight rating is sufficient to support pendants weighing up to 10g without causing link deformation. For heavier items, we recommend a technical consultation to ensure the "Bail" of the pendant does not cause excessive friction on the silver links.
7. How secure is the clasp mechanism on this brand-new piece?
The clasp is a professional-grade spring-action gate. We audit every new arrival for "Return Velocity," ensuring the gate snaps back to a closed position instantly. The high-carbon steel internal spring is protected by a silver housing to prevent corrosion and mechanical failure.
8. Are the jump rings on this chain soldered?
Every terminal jump ring connecting the clasp to the chain body is professionally soldered. This creates a continuous loop of metal, removing the "Gap Failure" risk found in cheaper chains where jump rings are simply bent together but not fused.
Environmental Care & Maintenance
9. Why does silver tarnish, and is it a sign of low quality?
Tarnish is a natural chemical reaction called "Sulphidation." It occurs when silver reacts with sulphur in the air or skin. It is actually a sign of authenticity; base metals or plated items react differently. Proper maintenance with a silver cloth easily reverses this process.
10. Is this chain safe to wear in a swimming pool?
We advise against it. Chlorine is a powerful oxidising agent that can cause "Stress Corrosion Cracking" in silver alloys over time. To preserve the structural integrity of the 13.5g mass, always remove the chain before entering chlorinated or chemically treated water.
11. How should I clean a 925 silver chain at home?
Use lukewarm water and a mild, phosphate-free detergent. Gently buff with a soft micro-fibre cloth. Avoid "Jewellery Dips" which can be too aggressive; a manual buffing approach preserves the surface smooth-finish and the 1.9mm link definition.
12. Does humidity in Devon affect silver storage?
Yes. High humidity can accelerate tarnish. We recommend storing your 925 silver asset in an airtight container or a lined jewellery box with an anti-tarnish strip to prevent atmospheric moisture from reacting with the copper in the alloy.
Acquisition & Asset Longevity
13. What makes a brand-new chain better than a pre-loved one?
A brand-new chain like the N925-137 offers "Zero Mechanical Wear." This means the link pivots have no internal friction damage, giving you the full engineering lifespan of the metal. It also ensures the clasp spring is at its maximum tension from day one.
14. How long can I expect this sterling silver chain to last?
With proper care, a solid 13.5g sterling silver chain is a multi-decade asset. Unlike new silver bracelets which suffer more impact trauma, a neck chain sits in a protected area, significantly extending its structural life.
15. Is H.E. Phillips Ltd an authorised silver retailer?
Yes. We have been a cornerstone of the Totnes jewellery trade since August 2000. Our commitment to metallurgical accuracy and UK hallmarking standards ensures that every piece we sell is legally compliant and technically verified for the consumer.
16. Can I exchange old silver for this new chain?
Absolutely. We offer a transparent sell gold or sell silver service. We can evaluate your old jewellery based on the current market spot price and apply that value toward the purchase of this brand-new 13.5g specimen.
Style & Coordination Intelligence
17. Does an 18-inch length fit all neck sizes?
The 18-inch "Princess" length is the most versatile industry standard. On a smaller frame, it sits slightly lower; on a larger frame, it sits closer to the base of the neck. It is generally the safest length to choose if you are purchasing the chain as a gift.
18. Can this silver chain be worn with a watch?
Silver coordinates perfectly with "Cool-Toned" watches. We suggest pairing it with stainless steel models from our Casio or Rotary collections for a technically cohesive and professional look.
19. Is this chain design considered "Unisex"?
While the 1.9mm width is traditionally popular for ladies' styles, the minimalist link design and substantial 13.5g weight make it a viable "unisex" option for those seeking a discreet, high-quality silver necklace that isn't overly delicate.
20. Why choose a chain over a silver bracelet?
Chains offer superior longevity because they are subject to less "Kinetic Impact" than bracelets. A bracelet constantly hits desks and surfaces, leading to faster link wear. A neck chain like this 18-inch model remains safely positioned, preserving the silver’s finish for longer.
© 2026 H.E. Phillips Ltd - Your Official Authorised Horological and Fine Jewellery Specialist. All Technical Data verified for forensic accuracy.
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