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Diamond Guide

To simplify the subject of diamond grading, the 4Cs relate to cut, colour, clarity and carat weight - a universal language that was established with the Gemological Institute of America (GIA) and introduced to the public by De Beers. The combination of these factors determines a diamond`s relative rarity and value.

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Birthstone Guide

Birthstones are gemstones that are associated with a birth month, each having a unique meaning and historical significance. The popularity of birthstones dates back to ancient times when civilizations believed that gemstones had incredible powers such as luck, health and prosperity. Traditionally, each month is associated with a single gemstone, but some months have multiple birthstones.

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Mohs Scale

The Mohs scale was developed by German mineralogist Friedrich Mohs and is a scale used by gemologists to classify a gem mineral’s resistance to scratching or in other words “the difficulty or ease with which one mineral can be scratched by another”.

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Silver & Gold Hallmarks

A hallmark is an official mark or series of marks struck on items made of metal, mostly to certify the content of noble metals—such as platinum, gold, silver and in some nations, palladium. In a more general sense, the term hallmark can also be used to refer to any distinguishing characteristic.

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Contact Us

Robert's Fine Jewellery
The Belfry Shopping Centre
Redhill, Surrey, RH1 1ST

Tel: 01737 762700

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Store Opening Hours

Monday to Saturday
9:3
0am to 5:00pm

Closed on Sundays
and Bank Ho
lidays

 

Registered in England No:12243862. VAT no. 334 0126 48

Copyright © 2025 Robert's Fine Jewellery Ltd. All rights reserved.

Registered address: Lintot House, 20 Fairbank Road, Southwater, West Sussex, United Kingdom, RH13 9LA. 

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