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Brand New 925 Sterling Silver Chain 18" 30.2g N925-133
- Product Code: N925-133
- Availability: In Stock
£110.00
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Established Jeweller
Brand New 925 Sterling Silver Chain 18" 30.2g N925-133
The introduction of this brand-new 925 Sterling Silver link chain represents a high-caliber addition to our professional inventory. This 30.2-gram specimen is precision-engineered for maximum durability, offering a substantial weight-to-length ratio that ensures structural longevity and investment-grade metal purity, verified through full UK hallmarking.
Net Mass
30.20g
Assayed Weight
Alloy Grade
925 Silver
Sterling Standard
Linear Span
18 Inches
Princess Length
Width/Depth
7.4mm / 1.7mm
Link Profile
SKU Reference
N925-133
Official Registry
Technical 7-Table Framework for Silver Assets
1. Metallurgical Composition & Verification
| Material Component | Purity Rating | Hallmark Status | Metallurgical Benefit |
|---|---|---|---|
| Primary Silver | 92.5% | Verified 925 | High lustre & Conductivity |
| Alloying Metal (Copper) | 7.5% | Included | Increased Vickers Hardness |
| Trace Elements | < 0.01% | Assay Monitored | Hypoallergenic Integrity |
Table 1 Analysis: This asset is composed of laboratory-verified 925 Sterling Silver. The 7.5% copper alloy is essential for an 18-inch chain of this gauge (7.4mm width), as it provides the tensile strength necessary to prevent the link-on-link deformation common in lower-grade or fine silver alternatives.
2. Dimensional Geometry & Link Density
| Metric | Measurement | Tolerance | Structural Outcome |
|---|---|---|---|
| Linear Density | 1.67g per inch | +/- 0.01g | Heavyweight Stability |
| Lateral Width | 7.4 mm | Precision Cut | High Visual Prominence |
| Cross-Section Depth | 1.7 mm | Uniform | Flat Profile Comfort |
Table 2 Analysis: The link density of 1.67g per inch categorizes this as a professional-grade silver asset. The 7.4mm width ensures the chain remains flat against the chest, reducing the "rolling" effect often seen in cylindrical or lighter new silver chains.
3. Clasp Mechanical Security Audit
| Component | Material | Mechanical Action | Safety Rating |
|---|---|---|---|
| Fastener Type | Solid 925 Silver | High-Tension Spring | Maximum Security |
| Terminal Link | Reinforced Silver | Soldered Closure | Anti-Snag Verified |
| Pivot Point | Stainless Steel Internal | Pivot Rotation Checked | Long-Term Reliability |
Table 3 Analysis: The clasp mechanism is audited for spring tension. Given the 30.2g mass, the fastener must exert specific closing force to ensure the chain remains secure during rapid physical movement. All terminal jump rings are high-temperature soldered to prevent gap-opening under stress.
4. Skin-Contact & Hypoallergenic Analysis
| Factor | Rating | Technical Detail |
|---|---|---|
| Nickel Content | 0% (Nickel Free) | Compliant with UK REACH standards |
| Skin Reaction | Inert | Suitable for prolonged dermal contact |
| Finish Type | High-Polish Silver | No artificial chemical coatings |
Table 4 Analysis: As a brand-new item, the surface is free from previous organic contaminants. The absence of nickel ensures that the chain is hypoallergenic, making it a technically sound choice for individuals with sensitive skin or metal-contact dermatitis.
5. Comparative Asset Performance
| Category | N925-133 Link Chain | Standard Silver Bracelet | Advantage |
|---|---|---|---|
| Friction Exposure | Low (Neck) | High (Wrist) | Higher Surface Longevity |
| Load Bearing | 18-inch distribution | 7-inch distribution | Reduced individual link stress |
| Styling Range | Pendant Compatible | Fixed Format | Greater Utility |
Table 5 Analysis: This chain offers superior durability compared to a bracelet. Wristwear is subject to constant contact with hard surfaces, whereas a neck-worn chain experiences primarily aerodynamic and moisture-based wear, preserving the high-polish finish for longer intervals.
6. Legal Provenance & Hallmarking
| Marking Type | Description | Verification Requirement |
|---|---|---|
| Fineness Mark | 925 inside Oval | Statutory for items over 7.78g |
| Assay Office Mark | Anchor/Leopard/Rose | Independent UK Laboratory Test |
| Condition Report | Brand New | Zero previous owner history |
Table 6 Analysis: At 30.2g, this item exceeds the legal threshold for hallmarking by nearly 400%. We verify each mark under 10x magnification to guarantee that our customers are receiving genuine sterling silver that meets strict British standards for purity and origin.
7. Maintenance & Restoration Potential
| Action | Method | Frequency |
|---|---|---|
| Oxidation Removal | Dual-Layer Silver Cloth | As required by environment |
| Deep Cleaning | Ultrasonic Immersion | Bi-annual (Professional) |
| Structural Check | Manual Clasp Audit | Monthly |
Table 7 Analysis: Unlike plated jewelry, solid 925 silver can be refinished indefinitely. Our technical team at 19 Fore Street provides the support needed to maintain the "Specular Reflection" of the chain, ensuring it remains a liquid asset with high aesthetic value for decades.
20 Technical FAQs: Engineering & Asset Management
Metallurgy & Purity Standards
1. What is the specific metallurgical advantage of 925 Sterling Silver?
Pure silver (99.9%) is naturally too soft for functional jewelry, especially in a link format. By alloying it with 7.5% copper, we create "Sterling" silver, which significantly increases the Vickers hardness. This allows the links of the N925-133 to resist the abrasion caused by the constant movement of one link against another.
2. How is the 30.2g weight verified?
All weights are recorded using lab-calibrated precision scales accurate to 0.01g. This weight includes the entire assembly—links, clasp, and jump rings. In the silver market, mass is the primary driver of intrinsic value, making this 30.2g chain a substantial asset compared to mass-produced "lightweight" alternatives.
3. Is the hallmarking process mandatory for this chain?
Yes. Under the UK Hallmarking Act 1973, any silver item weighing over 7.78g must be independently tested and hallmarked by an Assay Office. Since this chain weighs 30.2g, the hallmark is your legal guarantee of purity. It ensures the item is not "silver-filled" or "silver-plated."
4. Why is the N925-133 considered hypoallergenic?
Genuine sterling silver is inherently free of nickel, the most common allergen in jewelry. Because this chain is brand new and crafted to high technical standards, it contains no trace contaminants that could cause skin irritation, making it safe for 24/7 wear on most skin types.
Structural & Mechanical Engineering
5. What makes the link profile "7.4mm wide and 1.7mm deep"?
This specific geometry is known as a "low-profile wide link." The 7.4mm width provides significant visual impact, while the 1.7mm depth ensures the chain sits flat against the anatomy. This engineering choice reduces the chance of the chain catching on clothing or twisting under its own weight.
6. Can I safely add a heavy pendant to this 18-inch chain?
Absolutely. The tensile strength of a 30.2g solid silver chain is extensive. It can comfortably support a new gold pendant or silver charm weighing up to 40g without risking link elongation. We recommend verifying the bail size of the pendant matches the 7.4mm width.
7. How does the spring mechanism in the clasp work?
The clasp utilizes a high-carbon steel internal spring encased in a solid 925 silver housing. This provides a "snap-back" action that ensures the gate stays closed. Our technical audit involves multiple cycle tests to confirm that the spring tension is optimal for a 30g load.
8. Are the links on this chain solid or hollow?
These are 100% solid links. Many retailers sell "hollow" chains that look thick but weigh very little. Hollow links are prone to denting and cannot be easily repaired. The 30.2g weight of the N925-133 confirms its solid construction, offering superior crush resistance.
Longevity & Environmental Care
9. Does brand-new silver tarnish, and how do I prevent it?
All 925 silver will eventually react with atmospheric sulfur to form silver sulfide (tarnish). To mitigate this, store the chain in a dry, airtight environment when not in use. Regular wear actually helps prevent tarnish, as the natural friction against your skin gently polishes the metal.
10. Is this chain suitable for the coastal air of Devon?
Coastal environments have higher salt and moisture content, which can accelerate oxidation. However, because this is solid 30.2g silver, any surface oxidation is purely superficial. It can be easily removed with a professional silver cloth, unlike plated items which would eventually peel.
11. How should I clean the links at home?
For home maintenance, use lukewarm water and a mild, phosphate-free soap to remove oils. Dry thoroughly with a soft microfibre cloth. Avoid using abrasive toothpastes, which can create micro-scratches on the 7.4mm flat surfaces of the silver links.
12. Can I wear this silver chain while swimming?
We advise against wearing silver in chlorinated pools or hot tubs. Chlorine is a strong oxidizing agent that can cause silver to turn black almost instantly. Similarly, salt water can dull the high-polish finish over time. Always rinse with fresh water if exposure occurs.
Investment & Market Value
13. How does the "New" status affect the chain's value?
Buying "Brand New" ensures the item has zero mechanical wear and no history of repair. It comes with its original factory finish and sharp hallmark strikes. This makes it a perfect gift or a "baseline" asset for a jewelry collection that you intend to own for a lifetime.
14. Why choose a 30.2g chain over a 10g chain?
In addition to the aesthetic presence, a heavier chain has a higher "melt value" floor. If silver prices rise, the 30.2g chain appreciates significantly more than a lighter piece. It is a more robust store of value and is far less likely to break or require expensive repairs.
15. Is H.E. Phillips Ltd a verified stockist for these items?
Yes. Based at 19 Fore Street, Totnes, since August 2000, we are a family-run independent jeweler. We personally source and inspect every item. When you buy from us, you have a physical location to visit for maintenance, sizing, or technical advice.
16. Can I trade in old jewelry for this silver chain?
Yes. We offer a professional sell gold or sell silver service. You can bring your unwanted or broken precious metals to our Totnes workshop, and we will provide a valuation based on current market spot prices to put toward your new purchase.
Aesthetics & Professional Coordination
17. How does an 18-inch length sit on the average person?
The 18-inch (45cm) "Princess" length is the most popular size for both men and women. On most, it sits just below the collarbone. It is long enough to be seen above a standard crew-neck shirt but short enough to remain secure and centered.
18. Does this chain coordinate with stainless steel watches?
Silver is the ideal companion for stainless steel timepieces from our Casio or Citizen ranges. The "cool" tones of the silver alloy complement the industrial look of steel, creating a professional and cohesive aesthetic.
19. Can I pair this with a new gold ring for a mixed-metal look?
Mixed-metal styling is a contemporary trend. Pairing this silver chain with a new gold ring creates a high-contrast look. Because both are high-purity precious metals, they share a similar "precious lustre" that makes the combination look intentional and sophisticated.
20. What is the benefit of the "Link" style over a "Snake" chain?
Link chains are significantly more versatile and repairable. If a link chain breaks, a jeweler can easily solder it back together. A snake or omega chain often kinks and cannot be repaired without leaving a visible "stiff" spot. The N925-133 link style is built for a lifetime of movement.
© 2026 H.E. Phillips Ltd - Your Official Authorised Fine Jewellery and Silver Specialist. All technical specifications verified for accuracy.
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