T: +44 (0) 20 7123 4567 | E: support@brmjewellery.co.uk

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

MetalPurityHallmark
Gold — 9ct37.5%375
Gold — 14ct58.5%585
Gold — 18ct75.0%750
Gold — 22ct91.6%916
Platinum95.0%950
Palladium 95095.0%950
Palladium 50050.0%500
Sterling Silver92.5%925
Argentium Silver95.8%958
White Gold: All white gold is naturally off-white in colour. Most 9ct, 14ct and 18ct white gold items are Rhodium plated to give a brighter, more reflective surface — however this plating will wear over time and can be re-applied by a jeweller.

Wedding Ring Wall Thickness (Gauge)

ProfileClassicExtra HeavySuper Heavy
D Shape1.1 mm1.5 mm1.9 mm
Court1.3 mm1.8 mm2.3 mm
Flat1.0 mm1.3 mm1.6 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

LengthTypical 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

SizeTypical 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