Cottrills blocks

OUR STANDARDS

Why our diamonds sparkle brighter

We only purchase diamonds with a clarity of SI or greater and colour no less than H. This ensures that there are no inclusions visible to the naked eye. We also reject any diamond that has been artificially enhanced to improve the colour and appearance either by fracture filling or lasering.

Lasering – This is a technique which uses a laser to drill a hole through a diamond and into a dark inclusion. The diamond is then submerged in acid bleaching the inclusion making it appear less obvious.

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