You are at : Site Map > About Us > Our Diamond Quality Our Diamond Quality We have only one standard. High. The pinnacle of our business is based on supplying the finest, extremely rare D colour, flawless and excellent cut diamond. We realise that this is only accessible to a small percentage of our clients. We also offer a high-grade G colour, VS clarity and very good cut diamond. This is our House quality. Through our experience, we've learnt exactly what our customers want. These two qualities – both at the top end of the scale – encapsulate this understanding of our customers’ needs.   Characteristic Blacklocks Finest Diamond Quality Blacklocks Very Good Diamond Quality Rarity Represent the top 1% of the worlds diamonds Represent the top 15% of the worlds diamonds Colour: D-Z D - Colourless G - Near Colourless Cut: Excellent,Very Good, Good, Fair Excellent Very Good Clarity: FL, IF, VVS1, VVS2, VS1, VS2 ,S1-3, I1-3 FL VS1 Please visit the education and guidance section of our website should you wish to learn more about diamonds and their characteristics. [ About Us ] [ Since 1832 ] [ Family Philosophy ] [ The Blacklock Story ] [ The Blacklock Way ] [ Black Diamond ] [ Our Diamond Quality ] [ News ] [ Our Policy ]