Specifications & Care
Product Information
Detailed specifications, care guidance, and technical information for all BRM Jewellery products.
General Product Notes
Product photographs are not shown at actual scale.
Screen colours may not perfectly represent the true colour of the finished item due to monitor variation.
As handcrafted items, individual pieces may show slight natural variation in weight and appearance.
Natural stones possess expected variation in colour and character — this is not a defect.
Jewellery Care
With proper care your BRM Jewellery piece will last a lifetime. We recommend the following:
Remove rings and bracelets during heavy manual work such as gardening or building to prevent scratching and distortion.
Avoid exposing your jewellery to chlorinated swimming pools, seawater, and spa baths, as chemicals can damage precious metals and gemstone settings.
Clean with warm water, a small amount of mild soap, and a soft toothbrush. Rinse thoroughly and pat dry with a soft cloth.
Store pieces individually in a soft pouch or jewellery box to prevent scratching.
Metal Fineness Standards
| Metal | Purity | Hallmark |
|---|---|---|
| Gold — 9ct | 37.5% | 375 |
| Gold — 14ct | 58.5% | 585 |
| Gold — 18ct | 75.0% | 750 |
| Gold — 22ct | 91.6% | 916 |
| Platinum | 95.0% | 950 |
| Palladium 950 | 95.0% | 950 |
| Palladium 500 | 50.0% | 500 |
| Sterling Silver | 92.5% | 925 |
| Argentium Silver | 95.8% | 958 |
Wedding Ring Wall Thickness (Gauge)
| Profile | Classic | Extra Heavy | Super Heavy |
|---|---|---|---|
| D Shape | 1.1 mm | 1.5 mm | 1.9 mm |
| Court | 1.3 mm | 1.8 mm | 2.3 mm |
| Flat | 1.0 mm | 1.3 mm | 1.6 mm |
Band widths carry a ±0.5 mm tolerance. Item weights carry a tolerance of ±0.2 g (under 2 g) or ±10% (over 2 g).
Standard Necklace Lengths
| Length | Typical Use |
|---|---|
| 16 inches (41 cm) | Ladies choker / child's pendant |
| 18 inches (46 cm) | Ladies pendant / gentleman's choker |
| 20 inches (51 cm) | Average gentleman's / ladies cleavage length |
| 22 inches (56 cm) | Gentleman's waist chain |
| 28 inches (71 cm) | Longer waist chain / statement length |
Standard Bracelet Sizes
| Size | Typical Fit |
|---|---|
| 7½ inches (190 mm) | Average lady |
| 8¼ inches (209 mm) | Average gentleman |
BRM Jewellery · 3 Selkirk Road, London, SW17 0ER & Hatton Garden, EC1N 8DX
Tel: +44 (0) 20 7123 4567 · E-mail: support@brmjewellery.co.uk